Answer:
<h2>A = 177 cm²</h2>
Step-by-step explanation:
A diameter is two times longer than a radius. Therefore, if the diameter
d = 15cm, then the radius r = (15cm) : 2 = 7.5cm.
The formula of an area of a circle:

Substitute:


Then

18 / 25 = 0.72 per marker
If two adjacent angles have their exterior sides in perpendicular lines, then the two angles are also perpendicular. Exterior and interior angles sum up to 180 degrees. Hence if the exterior angle is perpendicular, then the interior angle should also be perpendicular in order to sum up to 180 degrees.
Https://us-static.z-dn.net/files/d5b/b845384fc1268b12d8e26abf6f82a538.jpeg
Answer:
4/5
Step-by-step explanation:
With reference angle E
Sin E = FG / EF
= 4/5