Step-by-step explanation:
65) Perimeter = 13 + 12 + 5 or 30 cm
Area= 5 x 12 / 2 or 30 cm^2
Perimeter formula: Add all the sides
Area formula ( triangle)= 1/2 bh
66) Perimeter = 8 + 4 + 7 + 3.5 or 22.5 ft