Sona collects 3 sticks of lengths 5cm, 12cm, and 13cm. The triangle that she makes contains a right angle. What is the area of this triangle?

\(30cm^2\)

\(50cm^2\)

\(70cm^2\)

\(55cm^2\)

\(60cm^2\)

2.

HARD

The following triangle is equilateral. Which of the following is closest to its area?

187 cm squared

186 cm squared

188 cm squared

190 cm squared

185 cm squared

3.

HARD

The following triangle is isoceles. Which of the following is closest to its area?

24 centimeters squared

36 centimeters squared

20 centimeters squared

27 centimeters squared

54 centimeters squared

4.

HARD

You have an isoceles triangle with side lengths 5, 5 and 6. If the three heights of the triangle are 4, 4.8, and 4.8, what is the area of the triangle?