For the triangle below, the perimeter is . Find the value of .

An acute isosceles triangle has an area of square units and a base with length . Find the perimeter of this triangle.

The height of the triangle is feet.

What is the length of the base of the triangle to the nearest tenth?

An equilateral triangle is placed on top of a square as shown by the figure below.

Find the perimeter of the shape.

In ΔABC: a = 10, c = 15, and B = 50°.

Find b (to the nearest tenth).

An isosceles triangle has a perimeter of . If the base of the triangle is two less than two times the length of each leg, what is the height of the triangle?

An isosceles triangle has a perimeter of . If the base of the triangle is two less than two times the length of each leg, what is the height of the triangle?

If a triangle has side lengths of and , which of the following can be a length of the third side?

is an equilateral triangle; is an equiangular triangle.

True or false: From the given information, it follows that .

An isosceles triangle is placed in a circle as shown by the figure below.

If diameter of the circle is , find the area of the shaded region.