Written Instructions:
For each Multiple Choice Question (MCQ), four options are given. One of them is the correct answer. Make your choice (1,2,3 or 4). Write your answers in the brackets provided..
For each Short Answer Question(SAQ) and Long Answer Question(LAQ), write your answers in the blanks provided.
Leave your answers in the simplest form or correct to two decimal places.
| 1) The following figure is made up of straight lines. The ratio of ∠x : ∠y is 2 : 7. Hence find the unknown angles. x y 45o ∠x : o ∠ y : o Answer:_______________ |
| 2) The following figure is made up of straight lines. The ratio of ∠x : ∠y is 3 : 5. Hence find the unknown angles. x y 4o ∠x : o ∠ y : o Answer:_______________ |
| 3) The following figure is made up of straight lines. The ratio of ∠x : ∠y is 2 : 8. Hence find the unknown angles. x y 40o ∠x : o ∠ y : o Answer:_______________ |
| 4) The following figure is made up of straight lines. The ratio of ∠x : ∠y is 2 : 5. Hence find the unknown angles. x y 26o ∠x : o ∠ y : o Answer:_______________ |
| 5) The following figure is made up of straight lines. The ratio of ∠x : ∠y is 2 : 7. Hence find the unknown angles. x y 18o ∠x : o ∠ y : o Answer:_______________ |
| 6) The following figure is made up of straight lines. The ratio of ∠x : ∠y is 2 : 6. Hence find the unknown angles. x y 36o ∠x : o ∠ y : o Answer:_______________ |
| 7) The following figure is made up of straight lines. The ratio of ∠x : ∠y is 2 : 5. Hence find the unknown angles. x y 12o ∠x : o ∠ y : o Answer:_______________ |
| 8) The following figure is made up of straight lines. The ratio of ∠x : ∠y is 2 : 6. Hence find the unknown angles. x y 20o ∠x : o ∠ y : o Answer:_______________ |
| 9) The following figure is made up of straight lines. The ratio of ∠x : ∠y is 3 : 7. Hence find the unknown angles. x y 10o ∠x : o ∠ y : o Answer:_______________ |
| 10) The following figure is made up of straight lines. The ratio of ∠x : ∠y is 2 : 6. Hence find the unknown angles. x y 4o ∠x : o ∠ y : o Answer:_______________ |
| 1) The following figure is made up of straight lines. The ratio of ∠x : ∠y is 2 : 7. Hence find the unknown angles. x y 45o ∠x : Answer: 30 o ∠ y : Answer: 105 o SOLUTION 1 : Step 1: ∠x = 2 units , ∠y = 7 units Step 2: 2 units + 7 units = 9 units Step 3: 180o - 45o = 135o Step 4: 9 units = 135o 1 unit = 135o ÷ 9 = 15o Step 5: ∠x (2 units) = 2 x 15o = 30o Step 6: ∠y (7 units) = 7 x 15o = 105o |
| 2) The following figure is made up of straight lines. The ratio of ∠x : ∠y is 3 : 5. Hence find the unknown angles. x y 4o ∠x : Answer: 66 o ∠ y : Answer: 110 o SOLUTION 1 : Step 1: ∠x = 3 units , ∠y = 5 units Step 2: 3 units + 5 units = 8 units Step 3: 180o - 4o = 176o Step 4: 8 units = 176o 1 unit = 176o ÷ 8 = 22o Step 5: ∠x (3 units) = 3 x 22o = 66o Step 6: ∠y (5 units) = 5 x 22o = 110o |
| 3) The following figure is made up of straight lines. The ratio of ∠x : ∠y is 2 : 8. Hence find the unknown angles. x y 40o ∠x : Answer: 28 o ∠ y : Answer: 112 o SOLUTION 1 : Step 1: ∠x = 2 units , ∠y = 8 units Step 2: 2 units + 8 units = 10 units Step 3: 180o - 40o = 140o Step 4: 10 units = 140o 1 unit = 140o ÷ 10 = 14o Step 5: ∠x (2 units) = 2 x 14o = 28o Step 6: ∠y (8 units) = 8 x 14o = 112o |
| 4) The following figure is made up of straight lines. The ratio of ∠x : ∠y is 2 : 5. Hence find the unknown angles. x y 26o ∠x : Answer: 44 o ∠ y : Answer: 110 o SOLUTION 1 : Step 1: ∠x = 2 units , ∠y = 5 units Step 2: 2 units + 5 units = 7 units Step 3: 180o - 26o = 154o Step 4: 7 units = 154o 1 unit = 154o ÷ 7 = 22o Step 5: ∠x (2 units) = 2 x 22o = 44o Step 6: ∠y (5 units) = 5 x 22o = 110o |
| 5) The following figure is made up of straight lines. The ratio of ∠x : ∠y is 2 : 7. Hence find the unknown angles. x y 18o ∠x : Answer: 36 o ∠ y : Answer: 126 o SOLUTION 1 : Step 1: ∠x = 2 units , ∠y = 7 units Step 2: 2 units + 7 units = 9 units Step 3: 180o - 18o = 162o Step 4: 9 units = 162o 1 unit = 162o ÷ 9 = 18o Step 5: ∠x (2 units) = 2 x 18o = 36o Step 6: ∠y (7 units) = 7 x 18o = 126o |
| 6) The following figure is made up of straight lines. The ratio of ∠x : ∠y is 2 : 6. Hence find the unknown angles. x y 36o ∠x : Answer: 36 o ∠ y : Answer: 108 o SOLUTION 1 : Step 1: ∠x = 2 units , ∠y = 6 units Step 2: 2 units + 6 units = 8 units Step 3: 180o - 36o = 144o Step 4: 8 units = 144o 1 unit = 144o ÷ 8 = 18o Step 5: ∠x (2 units) = 2 x 18o = 36o Step 6: ∠y (6 units) = 6 x 18o = 108o |
| 7) The following figure is made up of straight lines. The ratio of ∠x : ∠y is 2 : 5. Hence find the unknown angles. x y 12o ∠x : Answer: 48 o ∠ y : Answer: 120 o SOLUTION 1 : Step 1: ∠x = 2 units , ∠y = 5 units Step 2: 2 units + 5 units = 7 units Step 3: 180o - 12o = 168o Step 4: 7 units = 168o 1 unit = 168o ÷ 7 = 24o Step 5: ∠x (2 units) = 2 x 24o = 48o Step 6: ∠y (5 units) = 5 x 24o = 120o |
| 8) The following figure is made up of straight lines. The ratio of ∠x : ∠y is 2 : 6. Hence find the unknown angles. x y 20o ∠x : Answer: 40 o ∠ y : Answer: 120 o SOLUTION 1 : Step 1: ∠x = 2 units , ∠y = 6 units Step 2: 2 units + 6 units = 8 units Step 3: 180o - 20o = 160o Step 4: 8 units = 160o 1 unit = 160o ÷ 8 = 20o Step 5: ∠x (2 units) = 2 x 20o = 40o Step 6: ∠y (6 units) = 6 x 20o = 120o |
| 9) The following figure is made up of straight lines. The ratio of ∠x : ∠y is 3 : 7. Hence find the unknown angles. x y 10o ∠x : Answer: 51 o ∠ y : Answer: 119 o SOLUTION 1 : Step 1: ∠x = 3 units , ∠y = 7 units Step 2: 3 units + 7 units = 10 units Step 3: 180o - 10o = 170o Step 4: 10 units = 170o 1 unit = 170o ÷ 10 = 17o Step 5: ∠x (3 units) = 3 x 17o = 51o Step 6: ∠y (7 units) = 7 x 17o = 119o |
| 10) The following figure is made up of straight lines. The ratio of ∠x : ∠y is 2 : 6. Hence find the unknown angles. x y 4o ∠x : Answer: 44 o ∠ y : Answer: 132 o SOLUTION 1 : Step 1: ∠x = 2 units , ∠y = 6 units Step 2: 2 units + 6 units = 8 units Step 3: 180o - 4o = 176o Step 4: 8 units = 176o 1 unit = 176o ÷ 8 = 22o Step 5: ∠x (2 units) = 2 x 22o = 44o Step 6: ∠y (6 units) = 6 x 22o = 132o |