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Transcript
Do Now • Pull out your worksheet from yesterday for a stamp. • In your group, choose someone to fill each role • Spokesperson • Materials gatherer • Writer • Scorekeeper • Reminders: • Tutoring today • Turn in benchmark review to the basket • Turn in Quiz corrections Wednesday • Turn in bathroom passes for extra credit. • Beat Ouchi High! CPCTC POLYGONS JUDGE VALIDITY FORMULAS Team 1 Team 2 Team 3 Team 4 0 0 0 0 © 2006 by Mr. Mayers If ΔABC≅ΔDEF, then which angle is congruent to C? F Back In a regular pentagon, each side is 31cm. What is the perimeter? 155cm Back Find a counterexample to this statement: If a quadrilateral has all angles congruent, then it is a square. Rectangle Back What is the formula for the area of a trapezoid? A = (b1+b2) h 2 Back What is the reflexive property? A geometric object is congruent to itself. (AB≅AB or <C≅<C) Back Classify this quadrilateral Kite Back What does CPCTC stand for? Corresponding Parts of Congruent Triangles are Congruent Back How many total degrees are in the interior of a hexagon? What formula did you use? o 720 , 180(n-2) Back What do all right angles have in common? They are congruent, their angle measures are equal. Back Find the area of a parallelogram with base=3n and height=4mn. 2 12mn Back What are vertical angles? Vertical Angles are opposite angles from where 2 lines cross. Back List 2 properties of a parallelogram. Both pairs of opposite sides are parallel, diagonals bisect each other, both pairs of opposite sides are congruent, both pairs of opposite angles are congruent. Back If ΔBCD≅ΔFGH, then which side is congruent to GH? CD Back How many degrees are in the exterior of a nonagon? o 360 Back What property is true of all parallelograms? Both pairs of opposite sides are parallel, diagonals bisect each other, both pairs of opposite sides are congruent, both pairs of opposite angles are congruent. Back Find the area of this trapezoid. 42.5cm2 Back Are these two triangles congruent? Why/ why not? Back Solve for x in this parallelogram. X=30 Back Why is BD≅BD? Reflexive property Back How many degrees are in each exterior angle of an octagon? 45o Back If a triangle has two congruent sides, what can you conclude? It has two congruent angles (Isosceles) Back If a regular polygon has an angle sum of 1440o, how many sides must it have? 10 sides Back Name the steps to writing a good two column proof Back Solve for x and y in this parallelogram. What is x+y? x+y =13 Back In order to prove that CB≅ZX, what do we have to prove first? ΔCBA≅ΔZXY Back In a regular hexagon, with each exterior angle equal to x+20, what is the value of x? o 40 Back What do rhombi and rectangles have in common? They are both parallelograms (have all the properties of parallelograms) Back What is the formula for the area of a rectangle? A=bh Back Write a proof. Back Find AC + BD in this parallelogram. 22 Back