What is the radius? What is the diameter?
What it the circumference? Use 3.14 for pi.
What is the area?
Use 3.14 for pi.

Step-by-step explanation:

radius = 3mm

diameter = 6mm

circumference = 6 x 3,14 = 18.84 mm

area = 3^2 x 3,14 = 28.26 mm^2

answer: c i think

step-by-step explanation:

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation: