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ANGLES ARE NAMED WITH CAPITAL LETTERS A B vertex- where 2 lines meet C right anglemeasure equals 90o ⊾ means angle name of ⊾ABC or ⊾CBA or ⊾B ANGLES ARE NAMED WITH CAPITAL LETTERS A B vertex- where 2 lines meet C obtuse anglemeasure more than 90o ⊾ means angle name of ⊾ABC or ⊾CBA or ⊾B ANGLES ARE NAMED WITH CAPITAL LETTERS B vertex- can be the name of the angle ⊾B A C acute anglemeasure less than 90o ⊾ means angle name of ⊾ABC or ⊾CBA or ⊾B ⊾A=⊾CAT or ⊾TAC C A B adjacent means side by side common vertex ADJACENT T ⊾CAB OR ⊾BACsame ange ⊾BAT or ⊾TAB same angle IS Adjacent to 2 angles that add up to 90o are COMPLEMENTARY B E ADJACENT 30 60 R T ⊾BER & ⊾RET are complementary 2 angles that add up to 90o are COMPLEMENTARY B E 30 they don't have to be attached R T ⊾BER & ⊾TDKare complementary 60 K D 2 angles that add up to 180o are SUPPLEMENTARY B E 60 they don't have to be attached R K ⊾BER & ⊾TDKare complementary D 120 T 2 angles that add up to 180o are SUPPLEMENTARY E 60 K ⊾EDK & ⊾TDKare supplementary ADJACENT D 120 T right 3 1 180o acute 2 acute the angles in a triangle add up to 180 ⊾1 + ⊾2 + ⊾3= 180 right angle one right angle 2 acute angles acute 1 acute 180o 2 3 acute ⊾1 + ⊾2 + ⊾3 = 180 the angles in a triangleadd up to 180 acute triangle all angles acute 1 obtuse acute 3 acute 2 the angles in a triangleadd up to 180 obtuse triangle 1 obtuse angle 2 acute angles ⊾1 + ⊾2 + ⊾3= 180 20 given : complementary angles FIND MISSING ANGLE 55 given: supplementary angles FIND MISSING ANGLE 1 70 60 find the missing angle 2 3 ANGLES ARE NAMED WITH CAPITAL LETTERS R L T ⊾RTL ⊾LRT ⊾RLT NAME THE ANGLE E B W M WHAT KIND OF ANGLESARE ⊾BEM & ⊾MEW? ACUTE COMPLEMENTARY OBTUSE ADJACENT E B W M WHAT KIND OF ANGLESARE ⊾BEM & ⊾MEW? ACUTE COMPLEMENTARY OBTUSE SUPPLEMENTARY E B M W WHAT KIND OF ANGLESARE ⊾BEM & ⊾MEW? RIGHT SUPPLEMENTARY OBTUSE ADJACENT E B M W WHAT KIND OF ANGLESARE ⊾BEM & ⊾MEW? BIG SUPPLEMENTARY OBTUSE COMPLEMENTARY ANGLES ARE NAMED WITH CAPITAL LETTERS R L T ⊾T ⊾R ⊾L NAME THE ANGLE ANGLES THAT ARE SIDE BY SIDE ARE have a common vertex ADJACENT COMPLEMENTARY SUPPLEMENTARY OBTUSE acute triangle obtuse triangle left triangle right triangle right triangle obtuse trianlge acute triangle an-ugly triangle complementary acute triangle right triangle obtuse triangle the common endpoint that shared by 2 or more rays. where to rays meet 5 points vocal point vertex cross-roads |