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emmainna [20.7K]
3 years ago
6

Pls solve find the area shaded part all 3

Mathematics
1 answer:
aleksklad [387]3 years ago
5 0

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

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