Question

Is ABC a right triangle? explain.​

Answer 1

Answer: Yes,

Step-by-step explanation: ABC is a right triangle because angle B adds up to 90, to find angle B, we will need to find it first for the BDA and BDC triangle, we can do this using cos

for BDA cosθ = 12/15

θ = cos^-1(12/15) = 36.86989765

for BDC cosθ = 12/20

θ = cos^-1(12/20) = 53.13010235

these two added together equal 90

Answer 2

ABC is not a right triangle

Explanation:

The angle ABC doesn't have a straight line. for one of the legs or sides. The angle is actually an acute angle. The angle ABD and DBC or right angles but I don't belive that ABC is a right angle