Pls solve find the area shaded part all 3

below explained briefly

Step-by-step explanation:

(a) to find the area of parallelogram use the formula: b * h = 30 * 20 = 600m^2

(b) to find the area of shaded of this one: first we need to find the area of rectangle and then area of two triangle and subtract them with rectangle.

area of rectangle : length * width = 25 * 7  = 175 cm^2

area of two triangles = 2(1/2*b*h) = 2 ( 1/2 * 7 * 5 ) = 35 cm^2

area of shaded = 175 - 35 = 140 cm^2

(c) there different methods of finding area of this figure.

one of the famous methods are that we know it a equilateral triangle thus all sides are 60 degree

formula : 1/2 * a * b * sin(C)

using this formula : 1/2 * 8 * 8 * sin( 60 )

                              : 27.7 cm^2

- (2, -7)

- lines r and s and lines t and u must be parallel