 mycollegehive
The cross section of a uniform prism is a right-angled trian... 0 The cross section of a uniform prism is a right-angled triangle with sides 3cm, 4cm and 5cm. If its length is 10cm. Calculate the total surface area

A. 142cm

B. 132cm

C. 122cm

D. 112cm

107 views Share Follow University of Lagos Nigeria
13 April 2020 judziy, University of Benin
Use this formula surface area of a prism = PH + 2B. Where P is the base perimeter, H = height, B = base area
0 likes, 0 dislikes judziy, University of Benin
since the base area is a right angled triangle, There fore: the area of a right angle triangle, B = 1/2(Base * height)
0 likes, 0 dislikes judziy, University of Benin
The base perimeter is the sum of all the bases, i.e: 3 + 5 + 5
0 likes, 0 dislikes School not set Nigeria
16 September 2020 0 surface area of a prism = PH + 2B

P = perimeter of bases = sum of all bases = 3 + 4 + 5 = 12cm

H = height = 10cm

P*H = 12 * 10 = 120cm2

B = area of the base = 1/2(b*h) = 1/2(3*4) = 6cm2

surface area of prism = 120 + 2(6)

= 132cm2 Share 