Answer:
Area of the right triangular prism = 84 cm²
Step-by-step explanation:
A is the width of the right side rectangle = 4 cm
B is the length of the rectangle = 6 cm
C is the base of the triangle = 3 cm
D is width of the middle rectangle = 5 cm
b) Area of rectangle = length *width
[tex]\sf Area \ of \ triangle = \dfrac{1}{2}*base *height\\\\Area of 2 triangles = 2 *\dfrac{1}{2}*base * height = base * height[/tex]
Surface area of the right triangular prism = area of 2 triangle + area of left rectangle + area of middle rectangle + area of right rectangle
= 3 * 4 + 3*6 + 5 * 6 + 4 *6
= 12 + 18 + 30 + 24
= 84 cm²
