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8 th grade math chart.,!

Maria Torres 2 nd period Mrs. Rhine. 8 th grade math chart.,!. Perimeter.,!. Distance around a two-dimensional shape. Square p=4s Rectangle p=2L+2W or p=2(L+W) An easier way to find the perimeter is add up all the sides. Circumference.,!.

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8 th grade math chart.,!

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  1. Maria Torres 2nd period Mrs. Rhine 8th grade math chart.,!

  2. Perimeter.,! • Distance around a two-dimensional shape. • Square p=4s • Rectangle p=2L+2W or p=2(L+W) • An easier way to find the perimeter is add up all the sides.

  3. Circumference.,! • The distance around the edge of a circle(or any curvy shape) • C=2*3.14*r

  4. Area.,! • The size of a surface. • The amount of space inside a boundary of a flat(2-demensional) object such as triangle or circle. • A=s2(square) • A=lw or A=Bh(rectangular) • A=1/2(b1+b2)h or A=Bh/2(triangle) • A=(b1+b2)h/2(trapezoid) • A=pi*r2(circle)

  5. Surface area.,! • You can find the surface area in the total way or the lateral way and the equations are….... • Prism(total) s=ph+2B (lateral)S=Ph • And so on.

  6. Surface area • Cube(total) S=6s2 • Prism(lateral) S=Ph (total)S=Ph • Pyramid(lateral)s=1/2Pl (total)S=1/2Pl+B • Cylinder(lateral)S= 2 rh (total)S=2 r(h+r)

  7. volume • Prism v=Bh • Cylinder V=Bh • Pyramid V=1/3 Bh • Cone V=1/3Bh • Sphere V=4/3 r3.

  8. Volume.,! • The amount of 3-dimensional space an object occupies by an object, Capacity.

  9. Pi.,! • =3.14 or = 22/7 • Pi means that you use it when it indicates you to use it. Like when you use it to find formulas for a circle .

  10. 3 dimensional shapes,.! • Shapes that have a lot of sides and that you can measure every side.

  11. 2 dimensional shape.,! • Shape that is flat you can only see the front and can only measure the front.

  12. Ratios.,! • Numbers that are like fractions cause there divided in two with a symbol in the middle dividing the numbers. • Ex: 5/4 ratio

  13. PEMDAS.,! • Steps to a equation from the beginning so you can get it right.

  14. Big P.,! • The big P represents the perimeter of the base of a 3-dimensional figure.

  15. Big B.,! • Big B represents the area of the base of a 3-dimentional shape.

  16. Pythagorean theorem • You find Pythagorean theorem by using this equation a2+b2=c2 • The definition of this is to modified to apply outside its original domain.

  17. simple interest formula • You find the simple interest formula with this equation I=prt.

  18. Word problem perimeter • Square There's a box that they want to measure the perimeter the side lengths are 7ft. find the perimeter? answer: 28ft Rectangle This rectangle measures 5in of whith and 7in of length they want to find the perimeter. What is the perimeter? Answer: 39in

  19. Word problem circumference

  20. Word problem Area

  21. word problem.,! • if Valeria is going to pack Styrofoam in a rectangular prism and the length is 20,the width is 10,and the height is 15.what is the volume? • A. 3000 • B.2050 • C.100 • D. not In the choices above.

  22. Thanks for watching.,! Math rocks!!!!!!!Clip art and dictionary.com

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