Find the area of a right-angled triangle whose base is 12 cm and hypotenuse is 13cm. Choose the correct choice: A) 15 B) 30 C) 18 D) 12 E) 25
Sol. Height of the triangle = [(13) 2- (12) 2](1/2) cm = (25)(1/2) cm = 5 cm.   Its area = (1/2)* Base * Height = ((1/2)*12 * 5) cm^2 = 30 cm^2.   Ans: 30
<result>B</result>
Find the area of a right-angled triangle whose base is 12 cm and hypotenuse is 13cm.