Pythagoraean theorem.
17^2=8^2+b^2
289=64+b^2
225=b^2
Sqrt(225)=b
B=15
Answer:
40°
Step-by-step explanation:
180-(57+43)=100°
which mean the angle at the top =100°
180-100=80°
x=80/2
x=40
The sum of the interior angles of any quadrilateral is 360°.
So,
90° + 90° + 52° + x = 360°
=> 232° + x = 360°
=> x = 360° - 232°
=> x = 128°
Answer:
supplementary angles
Step-by-step explanation:
Answer:
70
Step-by-step explanation:
