Question

PLEASE HELP!! In isosceles triangle ABC, AC=BC=20, m 14 years ago

Answer 1

try drawing a picture, an isosceles triangle with altitude CD... then you can write all the information you know on it and see visually what's going on

from there, i do think you just use some basic trigonometry to find a ratio between a side you know and CD using your known angle

Answer 2

what's altitude though?

Answer 3

an altitude is a line drawn from the vertex to the opposite side that is perpendicular to that side