Question

Please answer the question​

Answer 1

Step-by-step explanation:

1.

area of a ∆= 1/2(b×h)

= 1/2(12cm×8cm)

= 6cm×8cm= 48cm²

2.

area of eq∆= √3/4 a²

= √3/4 × (12cm)²

= √3/4 × 144cm²

= √3 × 36cm²

=

3.

area of eq∆= √3/4 a² (1)

also area of a ∆ = 1/2(b×h)

= 1/2 (a × 8√3 cm)

= 4a√3 cm (2)

equating (1) and (2)

√3/4 a²= 4a√3 cm

a= 16cm

therefore area= 1/2( 16cm×8√3cm)

= 64√3 cm²

4.

area of eq∆= 25√3 cm²

√3/4 a²= 25√3 cm²

a²= 100 cm²

a= √100cm²= 10cm

also area= 1/2 (b×h)

25√3 cm²= 1/2(10cm× h)

25√3 cm²= 5cm×h

h= 5√3 cm

perimeter of an eq∆ = 3×side= 3× 10cm= 30cm

5. area of a rhombus= D× d/2 = 12cm× 18cm/2

= 12cm×9cm= 108cm²

6.

area of parallelogram= b×h= 12cm× 8cm= 96cm²

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