Problem

1. What is the surface area of the triangular prism? triangle base: \( b=9 \mathrm{~cm}, h=7 \mathrm{~cm} \) sides: \( 8 \mathrm{~cm} \) and \( 10 \mathrm{~cm}, h=5 \mathrm{~cm} \) F. \( 148 \mathrm{~cm}^{2} \) H. \( 153 \mathrm{~cm}^{2} \) G. \( 166.5 \mathrm{~cm}^{2} \) J. \( 198 \mathrm{~cm}^{2} \)

Solution

Step 1 :1. \(A_{triangle} = \frac{1}{2}bh = \frac{1}{2} \times 9 \times 7 = 31.5 \)

Step 2 :2. \(A_{sides} = (8 + 10)h = (8 + 10) \times 5 = 90 \)

Step 3 :3. \(A_{total} = A_{triangle} + A_{sides} = 31.5 + 90 = 121.5 \)

From Solvely APP
Source: https://solvelyapp.com/problems/21401/

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