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3 years ago

Help now please no links

Mathematics

2 answers:

Savatey [412]3 years ago

6 0

Answer: 60 cm²

Step-by-step explanation:

OUTLINE:

1. Find the area of triangles

2. Find the area of rectangles

SOLVE:

#1 Area of Triangles

Formula: a=(1/2)bh

a=area

b=base

h=height

b=6 cm

h=4 cm

a=(1/2)bh

a=(1/2)(6)(4)

a=12 cm²

There are 2 triangles ⇒ 12×2=24 cm²

#2 Area of Rectangles

Formula: a=bh

b=base

h=height

b=6 cm

h=2 cm

a=bh=6×2=12 cm²

There are 3 rectangles ⇒ 12×3=36 cm²

Find the total surface area: 36+24=60 cm²

Hope this helps!! :)

Please let me know if you have any questions

Umnica [9.8K]3 years ago

3 0

Answer:

60 cm^2

Step-by-step explanation:

I did it hope it helps

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Answer:

Proved

Step-by-step explanation:

$cos^4\alpha +sin^4\alpha =\frac{1}{4}(3+cos4\alpha )\\\\$

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$\frac{1+2cos2\alpha +cos^22\alpha +1-2cos2\alpha +cos^22\alpha }{4} \\\\\frac{2+2cos^22\alpha }{4} \\\\\frac{1+cos^22\alpha }{2} \\\\\frac{1}{2}(1+cos^22\alpha )\\\\$

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Hence Proved!

The following identities were used are attached in an image

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