1. Surface area of triangular prisms and pyramids

2. The nets for a triangular prism and a square pyramid

3. How to draw a triangular prism

4. Surface area of a triangular prism
SA= Ph + 2B
= (7+7+5)
•12 +2
( •5•10) 1 2 7m
= 19
•12
+ 2
•25
10m
= 228
+ 50 7m
= 278 m²
12m 5m
P = perimeter of the base (the triangle)
h = the height of the prism
B = area of the base

5. How to draw a pyramid

6. Surface area of a square pyramid1 2 8
SA = B Pl 1 2
( ) •8
= (5 • 5) + 5 1 2
= (25) +
(20) •8 1 2
= (25) +
(160) 5
= 25
+ 80
B = area of the base
= 105 ft2
P = perimeter of the base
l = length of the triangular face

7. Surface area of a triangular prism
SA= Ph + 2B
= ( ) • +
( • • ) m = • + • m = + m
= m² m m
P = ________ of the base (the triangle)
h = the ________ of the prism
B = _______ of the base

8. Surface area of a square pyramid1 2
SA = B Pl
( ) •
= ( ) +
= ( ) +
( ) •
= ( ) +
( ) = +
B = ______ of the base
= ft2
P = __________ of the base
l = ________ of the ____________ face