G 70 Exterior Angle1
User Manual: G-70
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Sheet 1 Triangle-Exterior Angle The measure of an exterior angle of a triangle is equal to sum of the measures of opposite interior angles. A Exterior angle : ∠ACX 350 Opposite interior angles : ∠A and ∠B Exterior angle = Sum of opposite interior angles ∠ACX = ∠A + ∠B ∠ACX = 1000 + 350 1000 B C ∠ACX = 1350 X Find the unknown exterior angle for each triangle. E 1) 2) 3) X B V 400 400 X F 500 T 700 500 G C U ∠EFX = ∠TVX = 400 D ∠BDX = P 4) F 300 D 5) X X 6) 450 W 400 E 450 X ∠EFX = Q 8) J U V ∠VWX = 9) A X 350 K R 650 P 350 400 L ∠KJX = X B ∠ABX = Printable Math Worksheets @ www.mathworksheets4kids.com 550 450 R ∠PQX = X 7) X C ∠QRX = 350 Q Answer key Sheet 1 Triangle-Exterior Angle The measure of an exterior angle of a triangle is equal to sum of the measures of opposite interior angles. A Exterior angle : ∠ACX 350 Opposite interior angles : ∠A and ∠B Exterior angle = Sum of opposite interior angles ∠ACX = ∠A + ∠B ∠ACX = 1000 + 350 1000 B C ∠ACX = 1350 X Find the unknown exterior angle for each triangle. E 1) 2) 3) X B V 400 400 X ∠EFX = F 500 T 700 500 G C U 1100 ∠TVX = 1000 400 D ∠BDX = 800 P 4) F 300 D 5) X X 6) 450 450 X 700 Q ∠PQX = X 7) W 400 E ∠EFX = 550 450 R U 900 8) J V ∠VWX = 1000 9) A X 350 K R 650 P 350 350 400 L ∠KJX = X 1050 X B ∠ABX = C 1250 Printable Math Worksheets @ www.mathworksheets4kids.com ∠QRX = 700 Q
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