The difference of the parallel sides of a trapezoidal field is 20 m. Its area is 450 m² and its altitude is 15m Find the length of the parallel sides.

The length of the parallel sides are 20 m and 40 m

Step-by-step explanation:

we know that

The area of a trapezoid is equal to

where

A is the area

b_1 and b_2 are the parallel sides

h is the altitude

we have

substitute

-----> equation a

Remember that

The difference of the parallel sides of a trapezoidal field is 20 m

I will assume that

so

----> equation b

solve the system of equations a and b by elimination

Adds equation a and equation b

Find the value of b_2

substitute the given value

therefore

The length of the parallel sides are 20 m and 40 m

£56

step-by-step explanation:

u divide 24 by 3 and u get 8 so if u do 8 time 7 or 8+8+8+8+8+8+8 u get 56 and 56 divided by 7 is 8.

12

step-by-step explanation:

a triangle's   full angle is 180 degrees so 180 - 156 = 24. 24/2=12