Question

Find the area of triangle ABC given that BC = 5 cm, CA = 7 cm and angle BCA = 90°

Answer 1

Answer:

1/2*5*7

= 17.5CM2

Step-by-step explanation:

We know,

Area(triangle)= 1/2*base*height

                        1/2*5*7          

                        = 17.5cm2

Answer 2

Answer

AB=√74

Using phythogarus theorem

Given AC=7cm BC=5cm

(AB^2=BC^2+AC^2)

AB^2=5^2+7^2

AB^2=25+49

AB^2=74

AB=√74

THEREFORE AB=√74

Step-by-step explanation: