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Angles with algebra day one.notebook December 01, 2016 Finding the missing angle measure using algebra 320 Earlier this week our angles looked like this! x0 What should we do now???? 2x + 20 4x Solve for the missing angle measures Equation Solve for x o o (5x + 7) 48 Find (5x + 7) Angles with algebra day one.notebook December 01, 2016 Solve for the missing angle measures Equation Solve for x 0 1 + x 2 3x 85 Find 2x + 10 and 3x - 85 To Solve for missing angle measures using algebra Step 1: Figure out if the angles given are congruent, same supplementary (180) or complementary(90) Step 2: Set up an equation that relates the angles If congruent set the measures equal If complementary add the measures & set them equal to 90 Step 3: Then solve for x Step 4: Find missing angle measures If supplementary add the measures & set them equal to 180 Angles with algebra day one.notebook December 01, 2016 Find the missing angle measures Equation Solve for x 2x - 10 65 - x 65 - x 2x - 10 Solve for angle 1 and angle 2 Equation solve for x (x + 40) o 1 2 (2x + 20)o Angles with algebra day one.notebook December 01, 2016 Name___________________________ Math 8 Angles: Using Algebra Date____________ 1. Patty is making a quilt following the pattern shown below. Show your work. (2x + 50) (3x) If all the horizontal lines are parallel, what is the value of x? Answer____________________ ___ 2. In the figure below, DC intersects BA at point B. D A 5x + 20 B 3x What is the measure, in degrees, of ABC? Show your work. Answer_________ degrees C Angles with algebra day one.notebook December 01, 2016 3. The figure below shows parallel lines cut by a transversal. y x z w d 75 a b Part A Based on the information in the figure, complete the table below with the measures of each angle a Angle b d x w Degree Measure Part B Name one pair of supplementary angles. Answer____________________ 4. In the figure below, lines m and n are parallel. Line l is a transversal. (8x) m B (3x + 40) n A Part A What is the value of x? Show your work. Answer_________________ l y z