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Surface Area Triangular

The document provides information on calculating the surface area of four triangular prisms. Each prism is made of two isosceles triangles and three rectangles. The surface area of each prism is calculated by finding the area of the three faces and adding them together. The areas of the faces for each of the four prisms are provided.

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Rommel C Mole
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476 views2 pages

Surface Area Triangular

The document provides information on calculating the surface area of four triangular prisms. Each prism is made of two isosceles triangles and three rectangles. The surface area of each prism is calculated by finding the area of the three faces and adding them together. The areas of the faces for each of the four prisms are provided.

Uploaded by

Rommel C Mole
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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Name Date

SURFACE AREA OF TRIANGULAR PRISMS 1


Each of these prisms is made from 2 isosceles triangles and 3 rectangles, two of which are
identical.

1) 6 cm Surface area
2.5 cm

3 cm
2 cm

2) Surface area
4 in
5 in

14 in

6 in

3) 10 cm Surface area
10 cm
12 cm

13 cm

13 cm

4) Surface area
8 cm

15 cm

12 cm
10 cm
Name Date

SURFACE AREA OF TRIANGULAR PRISMS 1 ANSWERS


1) 6 cm Surface area
2.5 cm Face 1: 6 x 2.5 = 15 cm2
Face 2: 6 x 3 = 18 cm2
Face 3: ½ x 3 x 2 = 3 cm2
3 cm
2 cm Surface area = 15 x 2 + 18 + 3 x 2
= 30 + 18 + 6 = 54 cm2

2) Surface area
4 in Face 1: 14 x 5 = 70 in2
5 in
Face 2: 14 x 6 = 84 in2
Face 3: ½ x 6 x 4= 12 in2
14 in
Surface area = 70 x 2 + 84 + 12 x 2
6 in = 140 + 84 + 24 = 248 in2

3) 10 cm Surface area
Face 1: 10 x 10 = 100 cm2
10 cm Face 2: 10 x 13 = 130 cm2
12 cm
Face 3: ½ x 10 x 12 = 60 cm2
13 cm Surface area = 100 + 130 x 2 + 60 x 2
= 100 + 260 + 120 = 480 cm2
13 cm

4) Surface area
Face 1: 15 x 10 = 150 cm2
8 cm
Face 2: 15 x 12 = 180 cm2
Face 3: ½ x 12 x 8 = 48 cm2
15 cm Surface area = 150 x 2 + 180 + 48 x 2
12 cm
= 300 + 180 + 96 = 576 cm2
10 cm

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