Answer:21
Step-by-step explanation:
1 and 4
All angles and sides are congruent:)
That's a right angled triangle.
Hope this helps!
Answer:
A triangular prism has three rectangular sides and two triangular faces. To find the area of the rectangular sides, use the formula A = lw, where A = area, l = length, and h = height. To find the area of the triangular faces, use the formula A = 1/2bh, where A = area, b = base, and h = height