A triangle is 12cm. If you extend it 2cm, its area will be increased by 3cm. What is the original area of this triangle

A triangle is 12cm. If you extend it 2cm, its area will be increased by 3cm. What is the original area of this triangle

Height = 3 × 2 △ 2 = 3cm
12×3÷2=18㎝²
The original area of this triangle is 18 cm;

The bottom of a triangle is 12 cm and the height is 34 cm. What is the area of the triangle?

The bottom of the triangle is 3 / 7 cm and the height is 4 / 7 cm. What is the area of the triangle in square centimeter

3/7 × 4/7 ÷2
= 12/49 ÷2
=6 / 49 square centimeter
The area of this triangle is 6 / 49 square centimeter

The area of a triangle is 30 square centimeters, and the area of a parallelogram with the same base and height as it is______ Square centimeter

30 × 2 = 60 (square centimeter) a: the area of a parallelogram with the same base and height is 60 square centimeter