Question

re 150 Evaluation on: 1. Find the area of triangle whose sides are 30cm, 40cm, 50 cm. 2. Find the area of quadrilateral ABCD whose sides are 13cm, 12cm, 9cm, 14cm and one of th diagonal is 15 cm. 3. A farmer has a field in the shape of a rhombus. The perimeter of the field is 400m. One of th diagonal is 120 m. He wants to divide the field into two equal parts to grow two different types el vegetables. Find the area of the field. 4. Find the TSA and LSA of the cube whose sides is 7.5cm. 5. If a cube has the total surface area 486cm2, then find its lateral Surface area. eer me
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Answer 1

Answer:

1st Question

Answer

Step-by-step explanation:

a=30

a=30 b=40

a=30 b=40c=50

a=30 b=40c=50A=√s(s-a)(s-b)(s-c)

a=30 b=40c=50A=√s(s-a)(s-b)(s-c) s= a+b+c/2

A= 1/4√-a^2+(ab)^2+2(ac)^2-b^4+2(bc)-c^4

=1/4√30^4+2(30.40)^2+2(40.50)^2-40^4+2(40.50)^2-50^4