Which of the following are true statements about any regular polygon? check all that apply. a. it is a quadrilateral. b. all of its angles measure 90. c. it is a closed figure. d. it is a hexagon. e. all of its angles have equal measures. f. its sides are congruent line segments.

- C. It is a closed figure.

E. All of its angles have equal measures.

F. Its sides are congruent line segments.

Explanation:-

A. False.

Reason:-Quadrilateral is a type of polygon.

B. False.

Reason:-Equilateral triangle is a regular polygon with interior angles measure 60°.

C.True.

Reason:- Definition of regular polygon.

D.False.

Reason:-Hexagon is a type of regular polygon with 6 sides .

E.True.

Reason:- Property of regular polygon.

F.True.

Reason:- Property of regular polygon.

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation:

not sure but it may be b, as i said i'm not sure.