Question

Dudies I need my answer real quick yk my exams are comin up....... so please for god sake solve question no. 3rd asap

Answer 1

Hey split the quadrilateral into two right triangles.

Then use pythagoras theorem to find the unknown side. Use 1/2bh to calculate the area of each triangle and add them up.

Try by yourself :)

Answer 2

Answer:

Area of ABCD = 234cm²

Step-by-step explanation:

After drawing the figure....

In triangle ADC, By Pythagoras Theorem

AD² + DC²=AC²

AD²+20² = 25²

AD² + 400 = 625

      AD²     = 625-400

      AD²     = 225

      AD       = 15cms

Area of triangle ADC = 1/2*B*H

                                   = 1/2*20*15

                                   = 150cm²    

In triangle ABC, By Pythagoras theorem

AB² + BC² = AC²

7² + BC² = 25²

49 + BC² = 625

        BC² = 625-49

        BC² = 576

        BC = 24cms

Area of triangle ABC = 1/2*B*H

                                   = 1/2*24*7

                                   = 84cm²

Area of ABCD = Area of triangle ABC + Area of triangle ADC

                        = 84 + 150

                        = 234cm²

Therefore,  Area of ABCD = 234cm²