Length of Base: 3/2m
A = (1/2)(b)(h)
A = (3/10)m sq
b = unknown
h = (2/5)m
Substitute into Formula: (3/10) = (1/2)(b)(2/5)
b = 1.5m (3/2m in fractions)
Area of the Shaded Part: 18u sq
A = (1/2)(b)(h)
A = unknown
b = 4u (count the grid)
h = 9u (count the grid)
Substitute into Formula: A = (1/2)(4)(9)
A = 18u sq
Area of Rectangle L: 57.6
A = bh
Three parts to this one!
Part 1 - Height for Rectangle K
A = 90
b = 15
h = unknown
Substitute into Formula: 90 = (15)(h)
h = 6
Part 2 - Height for Rectangle L
(15/12) = (6/h)
h = 24/5
Part 3 - Area for Rectangle L
A = unknown
b = 12
h = 24/5
Substitute into Formula: A = (12)(24/5)
A = 57.6 (57 and 3/5 in fractions)