Answer: 139º
Step-by-step explanation:
1. Add 19 and 22 together to get 41
2. since triangles are always 180º, subtract 41 from 180 to get 139
3. x = 139º
Answer:36π
Step-by-step explanation:
Diameter=12
Radius=diameter/2
Radius=12/2
Radius=6
Area of circle =π x Radius x Radius
Area of circle=π x 6 x 6
Area of circle=36π
Step-by-step explanation:
Interior angle + Exterior angle = 180°.
Size of Interior angle = 180° - 360°/n.
Question 32:
Exterior angle = 72°
Interior angle = 180° - 72° = 108°.
Therefore 180° - 360°/n = 108°, n = 5 => 5 sides.
Question 33:
Exterior angle = 36°
Interior angle = 180° - 36° = 144°.
Therefore 180° - 360°/n = 144°, n = 10 => 10 sides.