Question

11. Grade 7 students are making pyramid out of
cardboard for their ancient Egypt topic.
How many square centimeters of cardboard
will they need to build the whole pyramid?
​

Answer 1

Answer:

According to the question the area of the triangle is 1/2×length×height which gives the square centimetres of the whole pyramid is 570cm²

Step-by-step explanation:

Base of the triangular cardboard pyramid=56cm

Height of the triangular cardboard pyramid=20cm

Area of the triangular cardboard pyramid=1/2×base×height

1/2×56×20cm²

1/2×1120cm²

560cm²