9-1 Developing Formulas for s and quads Geometry

Review Perimeter of a square P = a + b + c Perimeter of a Triangle P = 2l + 2w Perimeter of a rectangle Pythagorean Theorem

Postulate 9-1-1 Area + post The area of a region is the sum of the areas of its nonoverlapping parts. Area of triangle + Area of rectangle

Area of a Square A=s2 __ S __ __ __

Area of Rectangle A=bh __ __ __ __ h __ __ __ __ b

Area of a Parallelogram A=bh Height is always  to base! > >> >> h __ __ > b

Ex. 1a.) Find the Area of the Parallelogram 30 mm 11 mm 34 mm

Ex.1b.) Find the height of a rectangle in which b=3 in. A=

Ex. 1c.) Find the perimeter of the rectangle in which 21cm

Area of a  A= (½) bh Or A= h b

Area of a Trapezoid A= (½) h(b1+b2) b1 > h > b2

Ex. 2a.) Find the area of a trapezoid in which

2b.) Find the base of the triangle in which 5x

2c.) Find the of the trapezoid, in which A= 231 mm²

Area of a Rhombus A= (½) d1d2 __ d2 __ d1 __ __

Area of a kite A= (½) d1d2 __ __ d2 __ d1 __

Ex. 3a.) Find of a kite in which and A=238 in²

Ex. 3b.) Find the area of the rhombus

3c.) Find the area of the kite y x 28 in. 29 in. 35 in.

Assignment

@ polygons have the same area. Area @ Post @ polygons have the same area. Ummmm…duh?