Question

Regular triangular pyramid has the slant height k=12 cm and lateral area A = 198 cm2. Find the length of the base edge.

Answer 1

3 congruent triangles make up the 3 sides

the area of a side is ... 198 / 3 cm^2

the slant height is the height of a triangular side

you have the area and the height of a triangle ... how do you find the base length?

Answer 2

Would you multiply by 2

Answer 3

A = 1/2 * b * h

Answer 4

how to find the area with a slant.

Answer 5

12x/2 x 3 =198

Answer 6

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Answer 7

Hi peeps!
How you do the problem is you do is you know that because its a regular triangle pyramid all sides are congruent so Al= 1/2 Pb*k.
So you plug in the numbers and the answer you get is 198=1/2*3*Ab*12
and in the end the answer you get is 11cm!

Hope this helped!

Answer 8

Ahh thank you so much Nado!!!!

Answer 9

Nice