Geometry 1. the vertex angle of an isosceles triangle is always acute. (true/false) 2. the base angles of isosceles triangles are always complementary.(true/false) 3.all of the sides of an isosceles triangle are always congruent. (true/false) i think the first one would be true, second true, and third one would be need confirmation

idk

step-by-step explanation:

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet