Question

An isosceles triangle has side lengths of 4.9cm and area of 4cm^2.
Work out the angle at the top of the triangle where the two corresponding side lengths meet.
Could someone please help me with this?

Answer 1

Answer:

Add up the lengths of the three side lengths to find the perimeter. Recall that the perimeter P = a + b + c. Now that you know the lengths of sides a, b and c, you simply need to add the lengths together to find the perimeter. In our first example,P = 3 + 4 + 5, or 12.