Answer:
a. 18 cm
Step-by-step explanation:
We are given that a circle has an area of 324π cm2. We are required to determine its radius. The formula for the area of a circle with radius r units is;

We plug in the area given and solve for r;

The radius of the circle is 18 cm
Answer:
132+54+90=276
360-276= 84
Step-by-step explanation:
a circle has 360° so subtract all the given angles to find the missing one. yu can subtract each one by one or add all the given angles and subtract which I did
Answer:

Step-by-step explanation:

Answer:
25
Step-by-step explanation:
15/6*10 = 25