Chapter 10
Alsysa
Chapter 10.1 (Parallelograms)
A=bh
The height will usually be shown by the length that is perpendicular to the base.
The answer should be given in square units.
10.1 (trapezoids)
A=1/2(4+8)3
A=1/2*12*3
A=6*3
A=18 m squared
10.2 (Area of a circle)
A=pi*r^2
If they only give you the diameter divide it in half.
The answer should be given in square units.
10.2 (Finding the radius)
530.66=3.14*r^2
169=r^2 (divided 530.66 by 3.14)
square root 169 and r
13=r
10.3 (How to classify solids)
If it has polygon bases it is called polyhedron.
10.3 (What are faces, edges, and vertices.)
Faces: All of the flat surfaces that form the polyhedron.
Edges: Segments where faces meet.Vertices: Where bases meet at a point.
10.4 (Using the net drawing)
then add them up.
2*225+4*450+2250in squared
10.5 (Surface area of a pyramid)
S=27.7+1/2*24*6
S=99.7squared units
10.5 (Surface area of a cone)
l= the slant height
Think of slant height as a ball rolling down a pyramid
10.6 (Volume of a prism)
For rectangular prisms:
V=l*w*h
For triangular prisms:
V=1/2*both the legs *h
Two reasons why to find volume.
2:Or even filling up a classroom with packing peanuts as a joke.
10.6 (Volume of a cylinder)
(cubed)
10.7 (Volume of a pyramid)
Area of the base= b*h