The base of a triangle is 1 cm more than 3 times its height. If the area of the triangle is 15 cm². Determine the length of the base and the height of this triangle.
A = 1/2 bh, so
1/2 (3h+1)h = 15
h = 3
check: 1/2 * 10 * 3 = 15
1/2 (3h+1)h = 15
h = 3
check: 1/2 * 10 * 3 = 15