A^2 + b^2 = c^2
9^2 + 12^2 = 225
square root of 225 is 15

Chance of boy: 627/1,358
Chance of girl: 731/1,358
N= 15
M= 15 √ 3
Brainliest please
Answer:
Step-by-step explanation:
The interior angles of a heptagon add up to 5*180 = 900
So
x + 143 + 116 + 135 + 135 + 116 + 155 = 900 Add up the known angles
x + 800 = 900 Subtract 800 from both sides
x + 800 - 800 = 900 - 800 Combine
x = 100