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3 years ago

An eraser is in the shape of a triangular prism. Its dimensions are shown in the diagram. What is surface area of the

Mathematics

2 answers:

MArishka [77]3 years ago

7 0

Answer:

D) 6,000 square mm

Step-by-step explanation:

To find the surface area of the triangular prism, find the are of each face.

40 × 30 ÷ 2 = 600 × 2 sides = 1200
40 × 50 = 2000
40 × 30 = 1200
40 × 40 = 1600

After adding all the sides' together, you get 6,000 square mm.

Colt1911 [192]3 years ago

4 0

Answer:

6000 square millimeters

Step-by-step explanation:

Side length of the slanting side can be calculated using the Pythagorean theorem,

L = sqrt(30^2+40^2) = 50

sufrace area of a triangular prism

= surface area of the end sections + the surface area of the three side faces

= 2*(30*40/2) + 40*(30+40+50)

= 1200 + 4800

= 6000 mm^2

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