Answer:
a) Triangle.
b) Triangle.
c) The area is 110 cm.
Step-by-step explanation:
The shape is given because it is a cross section of a Pyramid which we can see shaded in grey.
The area is given by the base times hight devided by 2. So 10cm * 22cm/2= 110cm.
Hope this helped ;)
Hello,
it's an equilateral triangle, all sides and all angles are the same.
so they are all 4 cm sides.
4 = 2y + 6
-2y = 6 - 4
-2y = 2
y = 2 : 2
y = 1 or -1
