9514 1404 393
Answer:
1040 cm²
Step-by-step explanation:
The lateral surface area of the pyramid is the area of the four triangular faces. Each one has an area of ...
A = 1/2bh
A = 1/2(20 cm)(26 cm) = 260 cm²
Then the area of the four faces is ...
4 × 260 cm² = 1040 cm² . . . . lateral surface area
