Answer:
below explained briefly
Step-by-step explanation:
(a) to find the area of parallelogram use the formula:<em> b * h</em> = 30 * 20 = 600m^2
(b) <u>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.</u>
area of rectangle : <em>length * width</em> = 25 * 7 = 175 cm^2
area of two triangles = 2<em>(1/2*b*h)</em> = 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.
<u>one of the famous methods are that we know it a equilateral triangle thus all sides are 60 degree</u>
<em>formula : 1/2 * a * b * sin(C)</em>
using this formula : 1/2 * 8 * 8 * sin( 60 )
: 27.7 cm^2
