Question

in the figure line BC is parallel to the line AD and angle ABC=90 [a] what is the area of angle ABC [b] what is the area of angle BCD

Answer 1

Area of ABC = 1/2 x ABxBC

Area of BCD = 1/2 x CD x AD [AD=BC - Sides of rectangle] [AB = CD]

Arc of ABC = 1/2x ABx BC

Area of BCD = 1/2x AB xBC [here we changed AB = CD, AD = BC]

so,ABC=BCD