Question

Write True or False and justify your answer:1.The area of a triangle with base 4 cm and height 6 cm is 24
${cm}^{2}$

2.The area of ∆ ABC is 8 cm

2 in which AB = AC = 4 cm and ∠A = 90º.
3.The area of the isosceles triangle is 5114 cm2, if the perimeter is 11 cm and thebase is 5 cm.
4.The area of the equilateral triangle is 203
${cm}^{2}$
2 whose each side is 8 cm.
5.If the side of a rhombus is 10 cm and one diagonal is 16 cm, the area of therhombus is 9
${cm}^{2}$

6.The base and the corresponding altitude of a parallelogram are 10 cm and 3.5 cm,respectively. The area of the parallelogram is 30
${cm}^{2}$
.
7.The area of a regular hexagon of side ‘a’ is the sum of the areas of the fiveequilateral triangles with side a.
8.The cost of levelling the ground in the form of a triangle having the sides 51 m,37 m and 20 m at the rate of Rs 3 per m2 is Rs 918.
9.In a triangle, the sides are given as 11 cm, 12 cm and 13 cm. The length of thealtitude is 10.25 cm corresponding to the side having length 12 cm.​

Answer 1

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