3.5
The area of triangle is : 18.0
60! You just do 12x5.
this is 5cm (:
Area = 0.5*12*7 = 42 square cm
384 square centimeters.
30 square cm because it's a right angle triangle
A=1/2(b)(h). So A=1/2(6cm)(4cm). A=12cm^2, or 12 squared centimeters.
12 x 9 = 108 square centimeters
The area is 108cm2
Area is 36cm2
Area = length * height. A = 20cm * 12cm A = 240 cm2
Use Pythagoras' theorem to find the triangle's altitude or height: 122-62 = 108 and the square root of this is 10.39230485 1/2*base*height = area 1/2*6*10.39230485 = 31.17691455 square units