A triangle with side a: 7, side b: 7, and side c: 5 cm has an area of 16.35 square cm.
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Area 51.
If two sides of a triangle have lengths of 5cm and 12cm, then the third side can have any length that's more than 7cm and less than 17cm. If the third side is 13cm, then the triangle is a right triangle.
Well, darling, to find the area of a shape, you need to know the shape itself! If those numbers represent the sides of a rectangle, you can pair them up to find the length and width. Then, just multiply the length by the width to get the area. So, in this case, the area would be 36 square centimeters.
The area of a rectangle is calculated by multiplying the length by the width. 7cm x 3.5cm = 24.5 cm2 - cm2 = centimeters squared
It is: 20*7 = 140 square cm