Geometric Solids EQ: What are the most common types of solids, what are cross sections and solids of...
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Transcript of Geometric Solids EQ: What are the most common types of solids, what are cross sections and solids of...
Geometric Solids
EQ: What are the most common types of solids, what are cross sections and solids of revolution?
Cross section: a two-dimensional figure created by the intersection of a plane and a solid – “a slice”
An orange is a SPHERE. If you cut through the orange the two-dimensional “slice” you get is a CIRCLE
Solid of Revolution: A 3-D figure “swept out” by rotating a
2-D figure around an axis
Volume = (Area of Base)(Height)
1. Type of solid: ____________________
Height of solid: _________________
Shape of base: _________________
Area of base: ___________________
Volume
2. Type of solid: ____________________
Height of solid: _________________
Shape of base: _________________
Area of base: ___________________
Volume
2. Type of solid: ____________________
Height of solid: _________________
Shape of base: _________________
Area of base: ___________________
Volume
3. Type of solid: ____________________
Height of solid: _________________
Shape of base: _________________
Area of base: ___________________
Volume
4. Type of solid: ____________________
Height of solid: _________________
Shape of base: _________________
Area of base: ___________________
Volume
5. Type of solid: _________________________
Volume
Cross-Section Problems #1) Given a sphere with a radius
of 200 cm3, find the area of the perpendicular cross section right through its center
#2) Given a cylinder with radius 7 in and height 10 in, find the area of a cross section that is parallel to its base
#3) Given a cone with a radius of 6 ft and a height of 12 ft, find the area of the triangle formed by a perpendicular cross section down through the cone’s center