A rectangle with diagonal of 20 cm has sides in the ratio 2:1. How do I find the area of rectangle?

The ratio of adults to seniors to children is 4:3:1. Add those three numbers, and divide the sum into 72. Multiply the quotient by 4, 3, and 1 to find...

Use the Pythagorean theorem to find the sides and then find the perimeter.

For the perimeter, add the four sides together and simplify. For the area, multiply the length by the width.

Let x = the width. Then the length is 2x - 7. The perimeter is twice the width plus twice the length: 64 = (2x) + 2(2x - 7) =...

You don't have enough information to solve.

Let s be the shorter side. Then (by the Pythagorean Theorem) s² + 48² = 50². So s² + 2304 = 2500. Then s² = 196, and s = 14...

There is no formula available for finding a side of an irregular pentagon.

Use the Pythagorean Theorem to find the other side. Then multiply the length by the width.

Use the Pythagorean Theorem (a^2 + b^2 = c^2). A and B are the lengths of the two sides of the rectangle. To get the length of the hypotenuse, you...

The area (60) is half the product of the diagonals. If d is the unknown diagonal, then 60 = 15d / 2. So 15d = 120, and d = 8...