Answer:
<u>Useful for this exercise:</u>
- Sum of interior angles of a triangle is 180°
- Straight angle is 180°
- Angle addition postulate
<u>Finding missing angles:</u>
- m∠1 = 180° - (57° + 72°) = 51°
- m∠2 = 90° - 72° = 18°
- m∠3 = 180° - 57° = 123°
- m∠4 = 180° - (18° + 123°) = 39°
Answer:
9.1x- 10000
9.1 x 10^-4
Step-by-step explanation:
b
Answer:
60
Step-by-step explanation:
All the angles in that triangle are the same due to the type of triangle.
The value of x is 8 and it is right