Given : J(-4,1) E(-2,-3) N(2,-1) Prove : JEN is an isosceles right triangle

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great

Pls as soon as ! will award brainliest and 20 ! also the answer is not 22.5 degrees! find the value of x in each case:

Two sides of a right triangle measure 2 units and 4 units. what is the area of the square that shares a side with the third side of the triangle?