Workbook pg. 231 #1-22 (skip 15 &19). Monday October 8 Daily Check: Chords.

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Presentation transcript:

Workbook pg. 231 #1-22 (skip 15 &19)

Monday October 8 Daily Check: Chords

Daily Check

D Describe the extrema of the quadratic y = -2(x – 3) a.Maximum at (-3, 2) b.Minimum at (-3, 2) c.Minimum at (3, 2) d.Maximum at (3, 2)

For each circle, find the value of x. No decimals. Write answers in simplified fraction or radical form x 4 5 x 3 x 6 4 x 8 13

Math II UNIT QUESTION: What special properties are found with the parts of a circle? Standard: MM2G1, MM2G2 Today’s Question: What effect does changing the radius have on S.A. and Volume of a sphere? Standard: MM2G4.a,b

r HEMISPHERE: HALF A SPHERE Think of the globe! The equator cuts the earth into the northern and southern hemisphere.

Formulas for a Sphere

10 cm Find the exact and approximate Surface Area & Volume of a Sphere (round to the nearest hundredths)

25 in The circumference of a great circle of a sphere is 25 inches. Find the approximate surface area & volume of the sphere. (Round to the nearest tenths.)

5 in SA and Volume of a Sphere A spherical balloon has a surface area of 16 in. 2 Find the volume of the sphere. 10 in

5 in Surface Area & Volume of a Sphere A spherical balloon has an initial radius of 5 in. When more air is added, the radius becomes 10 in. Explain how S.A. and Volume change as the radius changes. 10 in

Old SphereNew Sphere Radius Surface Area Volume

Old SphereNew Sphere Radius Surface Area Volume

Old SphereNew Sphere Radius Surface Area Volume

5 in Volume of a Sphere A sphere has an initial volume of 400 cm. 3 The sphere is made bigger by making the radius 4 times as big. What is the new volume of the sphere? 10 in

c

c

b