Which properties belong to all isosceles triangles? Check all that apply.

a. The base angles are congruent. All three angles are congruent.

b. The two sides opposite the base angles are congruent. All three sides are congruent.

c. The bisector of the vertex angle is the perpendicular bisector of the base.

A. The base angles are congruent.

              C. The two sides opposite the base angles are congruent.

               and E. The bisector of the vertex angle is the perpendicular         bisector of the base.

Step-by-step explanation:

All Isosceles tringles have two congruent sides, and the angles opposite those sides will be congruent. Because the angles are congruent so is the base angles of an isosceles triangle.

This answer was meant to be a check all that apply so please put the answers separately next time.

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

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