Regular triangular pyramid has 6 cm long base edge and slant height k=9 cm. find the lateral area of the pyramid.

Answer

81 cm^2

Step-by-step explanation:

lateral area : 3 triangles of base 6 cm and height 9 cm

Lateral area = 3 times 1/2 times 6 times 9

=  81 cm^2

x+14

step-by-step explanation:

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.