no 12 a) Q12.(a) In the figure (1) given below, ABCD and AEFG are two parallelograms. Prove that area of || gm ABCD = area of || gm AEFG.
Area of traingle (ADC = AEB)
Area of traingle (BOD = COE)
no 12 a)
Q12.(a) In the figure (1) given below, ABCD and AEFG are two parallelograms. Prove that area of || gm ABCD = area of || gm AEFG.
(i)BG if AD = 6 cm.
(ii)CF if GE =2.3 cm.
(iii)AB if BC = 2.4 cm.
(iv)ED if FD = 4.4 cm.
10. ABC is a triangle in which AB=AC=4 cm and . Calculate the area of ABC. Also find the length of perpendicular from A and BC.
Hint: By Pythagoras theorem, BC2=AB2+AC2=42+42=32 BC =4cm.
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ANS: 192cm2.
Q.15. If the perimeter of a right angled triangle is 60 cm and its hypotenuse is 25 cm, find its area.