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Transcript
1. Get out paper for your warm up (Next Slide) 2. DEAR when you are finished Warm Up-Solve for x 1.9x-7=-7 x=0 2.144= -12(x-5) x= -17 3.x-1 = 5x+3x-8 x= 1 4.2(4x-3) -8 = 4+2x x=3 Introduction to Geometry!! Polygon: Closed plane figure made up by 3 or more line segments where no lines can intersect. Polygons!! Not Polygons!! Regular Polygon: All sides and all angles are congruent. Polygon Triangle # of Polygon Sides/Angles 3 Heptagon # of Sides/Angles 7 Quadrilateral 4 Octagon 8 Pentagon 5 Nonagon 9 Hexagon 6 Decagon 10 Any shape with larger than 10 sides, we will call ____-gon EX) 15 sides will be 15-gon Triangles by Sides 1. Scalene: 0 sides congruent 2. Isosceles: 2 sides congruent 3. Equilateral: 3 sides congruent Triangles by Angles 1. Acute: All angles are less than 90° 2. Obtuse: One angle is greater than 90° 3. Right: One angle equal to 90° Quadrilaterals Quad. Quad. Rhombus Characteristics 4 congruent sides Rectangle 4 right angles Square 4 congruent sides and 4 right angles Trapezoid 1 pair of parallel sides Kite 2 pairs of congruent adjacent sides Parallelogram Characteristics 2 pairs of parallel sides Quadrilaterals To Do: With your group, complete the back of the note sheet. You have 15 minutes to complete these problems. Extension Create a Picture using AT LEAST (You may use more objects if you choose): - 3 regular triangles -2 isosceles triangles -2 squares -1 pentagon -1 regular hexagon -1 trapezoid -1 kite When you are finished creating your masterpiece double check that you used all of the required pieces and color it!! Area and Perimeter Area: The number of square units inside a figure. Perimeter: The distance around the outside of a figure. Rectangles and Parallelograms A=B*H Draw this figure on paper and find the area and perimeter Draw this figure on paper and find the area and perimeter Draw this figure on paper and find the area and perimeter Homework Complete the Worksheet