Name : Sheet 1 Triangle - Angles 1) In the figure, DABD is an isosceles triangle with AB = AD. Find mÐACB. A 440 D B 2) In the figure, KLMN is a square. Determine mÐMKJ. 290 C L K M N 490 J 3) Triangle OPQ and triangle ORS are acute triangles. What is mÐP? Q R 670 630 O 640 S P 4) If DEGH is an isosceles triangle with EG = EH, determine mÐFGH and mÐEHG. G F 600 H 300 460 E 5) DRSU is an equilateral triangle. What is mÐQTP and mÐTOU? R Q 550 O S Printable Worksheets @ www.mathworksheets4kids.com T U P Name : Answer key Sheet 1 Triangle - Angles 1) In the figure, DABD is an isosceles triangle with AB = AD. Find mÐACB. A 440 D B 390 2) In the figure, KLMN is a square. Determine mÐMKJ. 290 C L K M N 490 860 J 3) Triangle OPQ and triangle ORS are acute triangles. What is mÐP? Q R 670 630 O 640 600 S P 4) If DEGH is an isosceles triangle with EG = EH, determine mÐFGH and mÐEHG. G F 600 H 300 460 1570 ; 670 E 5) DRSU is an equilateral triangle. What is mÐQTP and mÐTOU? R Q 550 O S 350 ; 850 Printable Worksheets @ www.mathworksheets4kids.com T U P Name : Sheet 2 Triangle - Angles 1) If DCED is an equilateral triangle, determine mÐAED. C E B 1200 190 A D 2) DJKM is an isosceles triangle. Find mÐLMK, if mÐLMJ = 900. L K 860 J M B 3) If DABC is a right triangle, determine mÐB. 250 320 C D A 4) DEFG is an equilateral triangle. If EH = HF, find mÐHEF and mÐGFH. G H 1040 E 5) If DVYZ and DXYW are right triangles, then find mÐVYZ and mÐZYX. F Y 440 W 440 Z Printable Worksheets @ www.mathworksheets4kids.com V X Name : Answer key Sheet 2 Triangle - Angles 1) If DCED is an equilateral triangle, determine mÐAED. C E B 1200 190 A D 790 2) DJKM is an isosceles triangle. Find mÐLMK, if mÐLMJ = 900. L K 860 J M 430 B 3) If DABC is a right triangle, determine mÐB. 250 320 C D A 330 4) DEFG is an equilateral triangle. If EH = HF, find mÐHEF and mÐGFH. G H 1040 E 380 ; 220 5) If DVYZ and DXYW are right triangles, then find mÐVYZ and mÐZYX. F Y 440 W 440 Z 460 ; 920 Printable Worksheets @ www.mathworksheets4kids.com V X Name : Sheet 3 Triangle - Angles 1) In the figure, DDEF and DHGF are right triangles. Find mÐDFH. F G E 230 290 H D 2) DXYZ and DXWZ are isosceles triangles. Determine mÐYZW, if mÐWXY = 900. Y Z X W 3) DKLM is an equilateral triangle. Find mÐKOL. L P O M N K 4) DOPQ and DORS are isosceles triangles with OP = PQ and OR = OS. Find mÐOPQ and mÐROQ. R 660 O S Q P 5) In the figure, triangle TVS is a right triangle. Determine mÐUTS and mÐVST. T 240 400 U Printable Worksheets @ www.mathworksheets4kids.com V S Name : Answer key Sheet 3 Triangle - Angles 1) In the figure, DDEF and DHGF are right triangles. Find mÐDFH. F G E 230 290 H 520 D 2) DXYZ and DXWZ are isosceles triangles. Determine mÐYZW, if mÐWXY = 900. Y Z X W 1350 3) DKLM is an equilateral triangle. Find mÐKOL. L P O M N K 1200 4) DOPQ and DORS are isosceles triangles with OP = PQ and OR = OS. Find mÐOPQ and mÐROQ. R 660 O S Q P 840 ; 1320 5) In the figure, triangle TVS is a right triangle. Determine mÐUTS and mÐVST. T 240 400 740 ; 660 Printable Worksheets @ www.mathworksheets4kids.com U V S