Sara buys a sweater at a department store. The sweater costs $15. The store is having a 20% off sale on everything in the store.
2 answers:
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Answer:
<em>A = 144 cm^2</em>
Step-by-step explanation:
a.
The 3D shape shown in the image is a prism, known because it has two parallel faces called bases (the front and back triangles) and the other faces being parallelograms.
b.
To compute the total surface area, we must add the area of the five faces of the shape.
For the bases:
For the upper face
Where z is the hypotenuse of the triangle and w is the depth of the prism.
For the face-down surface
For the right face
The total area is
c.