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ch4aika [34]
3 years ago
5

3 cm 18 cm 30 cm 3 cm 18 cm

Mathematics
1 answer:
navik [9.2K]3 years ago
4 0

Answer:

756

Step-by-step explanation:

Area of triangle

\frac{(18 + 3 + 3)18}{2}  =  \\  = 24 \times 9 =  \\  = 216

Area of rectangle

18 \times 30 = 540

Total area

540 + 216 = 756

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The angels of a triangle have a sum of 180°. The angles of a rectangle have a sum of 360°. The angels of a pentagon have a sum o
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Step-by-step explanation:

It is given that the angels of a triangle have a sum of 180°. The angles of a rectangle have a sum of 360°. The angels of a pentagon have a sum of 540.

<u>Let me define the each terms.</u>

1. We know that each angle in a triangle is 60°, So there is a three angle in a regular triangle.

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2. We know that each angle in a rectangle, is 90°, So there is a four angle in a regular rectangle.

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Similarly,

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So, sum of the angles of an octagon = 135° × 8

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Step-by-step explanation:

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6 0
3 years ago
Read 2 more answers
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