formula of lesson solids

square pyramid :

• basre area = b²
• Area of lateral face=1/2 bl
• L.S.A= 2bl
• T.S.A= b² + 2bl
• Volume of square pyramid = 1/3 * base area * height. = 1/3 *b² * h .

( where b = base , l = slant height ,h= height )