C is correct bc if you add 10 to x you get the value of y
Tan (x) = 0.8. To calculate the angle x, find the tan⁻¹ (0.8) = 38.7°
The area of a circle of radius r is pi*r^2
Hence here the area is A=5^2*pi=25pi~78.5 square inches
Answer:
∠2 = 80°
Step-by-step explanation:
Since BD is a diameter then
∠1 + ∠2 = 180°, that is
100° + ∠2 = 180° ( subtract 100° from both sides )
∠2 = 180° - 100° = 80°
