# Finding an angle measure of a triangle given two angles Online Quiz

Following quiz provides Multiple Choice Questions (MCQs) related to **Finding an angle measure of a triangle given two angles**. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using **Show Answer** button. You can use **Next Quiz** button to check new set of questions in the quiz.

**Q 1 - Find the missing angle in the given triangle below. Sum of angles in a triangle is 180°.**

### Answer : C

### Explanation

**Step 1:**

Sum of angles in a triangle is 180°.

29° + 33° + b = 180°; 62° + b = 180°

**Step 2:**

b = 180° − 62° = 118°

So missing angle = 118°

**Q 2 - Find the missing angle in the given triangle below. Sum of angles in a triangle is 180°.**

### Answer : A

### Explanation

**Step 1:**

Sum of angles in a triangle is 180°.

119° + 34° + b = 180°; 153° + b = 180°

**Step 2:**

b = 180° − 153° = 27°

So missing angle = 27°

**Q 3 - Find the missing angle in the given triangle below. Sum of angles in a triangle is 180°.**

### Answer : B

### Explanation

**Step 1:**

Sum of angles in a triangle is 180°.

115° + 31° + b = 180°; 146° + b = 180°

**Step 2:**

b = 180° − 146° = 34°

So missing angle = 34°

**Q 4 - Find the missing angle in the given triangle below. Sum of angles in a triangle is 180°.**

### Answer : D

### Explanation

**Step 1:**

Sum of angles in a triangle is 180°.

130° + 20° + x = 180°; 150° + x = 180°

**Step 2:**

x = 180° − 150° = 30°

So missing angle = 30°

**Q 5 - Find the missing angle in the given triangle below. Sum of angles in a triangle is 180°.**

### Answer : B

### Explanation

**Step 1:**

Sum of angles in a triangle is 180°.

85° + 50° + x = 180°; 135° + x = 180°

**Step 2:**

x = 180° − 135° = 45°

So missing angle = 45°

**Q 6 - Find the missing angle in the given triangle below. Sum of angles in a triangle is 180°.**

### Answer : D

### Explanation

**Step 1:**

Sum of angles in a triangle is 180°.

90° + 40° + x = 180°; 130° + x = 180°

**Step 2:**

x = 180° − 130° = 50°

So missing angle = 50°

**Q 7 - Find the missing angle in the given triangle below. Sum of angles in a triangle is 180°.**

### Answer : C

### Explanation

**Step 1:**

Sum of angles in a triangle is 180°.

65° + 57° + x = 180°; 122° + x = 180°

**Step 2:**

x = 180° − 122° = 58°

So missing angle = 58°

**Q 8 - Find the missing angle in the given triangle below. Sum of angles in a triangle is 180°.**

### Answer : A

### Explanation

**Step 1:**

Sum of angles in a triangle is 180°.

75° + 75° + b = 180°; 150° + b = 180°

**Step 2:**

b = 180° − 150° = 30°

So missing angle = 30°

**Q 9 - Find the missing angle in the given triangle below. Sum of angles in a triangle is 180°.**

### Answer : A

### Explanation

**Step 1:**

Sum of angles in a triangle is 180°.

45° + 26° + b = 180°; 71° + b = 180°

**Step 2:**

b = 180° − 71° = 109°

So missing angle = 109°

**Q 10 - Find the missing angle in the given triangle below. Sum of angles in a triangle is 180°.**

### Answer : D

### Explanation

**Step 1:**

Sum of angles in a triangle is 180°.

123° + 39° + b = 180°; 162° + b = 180°

**Step 2:**

b = 180° − 162° = 18°

So missing angle = 18°