What's the lateral area of the following pyramid? : 129.6 cm² 172.8 cm² 86.4 cm² 259.2 cm²

129.6 cm²

Step-by-step explanation:

The lateral area (A) is the area of the 4 congruent triangular faces.

A = 4 × bh ( b is the base and h the perpendicular height )

Here b = 8 and h = 8.1 , thus

A = 4 × × 8 × 8.1 = 2 × 8 × 8.1 = 16 × 8.1 = 129.6 cm²

my acc plz

step-by-step explanation:

i think it is c, not positive though

step-by-step explanation: