What is the surface area of the square pyramid represented by the net? Enter your answer in the box. ( ) cm2

Question

asked May 19, 2018 141k views

2 Answers

Jianwu Chen · Answer 1 · 2018-05-22T21:34:00+0000

Answer:
$175\ cm^2$

Explanation:

From the given picture the surface area of square pyramid = Area of square+Area of 4 triangles.

Area of square =
$side^2=7^2=49\ cm^2$

For triangles, base of triangle b=7 cm

Height of triangle= 9 cm

Area of one triangle=
$(1)/(2)bh=(1)/(2)(7)(9)=(63)/(2)\ cm^2$

Now, Area of 4 triangles =
$4*(63)/(2)=126\ cm^2$

Area of square pyramid =Area of square+Area of 4 triangles.

$=49\ cm^2+126\cm^2=175\ cm^2$