For questions 1-4 Find the missing triangle

1. 51°

2. 40°

3. 65°

4. 60°

Step-by-step explanation:

The sum of the angles in a triangle is 180°. We can use the angles given to find the missing angle.

1. 51°

42+87+x=180

129+x=180

x=51

2. 40°

110+30+x=180

140+x=180

x=40

3. 65°

20+95+x=180

115+x=180

x=65

4. 60°

60+60+x=180

120+x=180

x=60

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step-by-step explanation: