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If all three pairs of corresponding angles of two triangles are equal, then the triangles are similar. (RHS)ĭraw two triangles of each of four conditions  SIMILARITY

The hypotenuse and a side of the other triangle. Two right-angles triangles are congruent if the hypotenuse and a side of the one triangle is equal to Two triangles are congruent if two angles and one side are equal to two angles and one side of the Two triangles are congruent if two sides and the included angle are equal to two sides and the Two triangles are congruent if three sides of one triangle are equal in length to the three sides of the Thus, the triangle is an isosceles right triangle. Since the lengths of two sides are equal, the triangle is (Find the slopes and the lengths of theįirst, prove the triangle is a right triangle (see above), and then use the distance formula to find the Use the slope formula twice and the distance formula twice. The triangle is an isosceles right triangle. Hypotenuse is equal to the sum of the square of the lengths of the two adjacent legs ,

(Find right triangle the lengths of the three sides.)ĭetermine that since the lengths of two sides are equal and that the square of the length of the  A triangle is an isosceles right triangle  One interior angle is 90  RELATIONSHIP BETWEEN ANGLES  SUM OF THE ANGLES OF A TRIANGLE  EXTERIOR ANGLE OF A TRIANGLE  TRIANGLES  THERE ARE FOUR KINDS OF TRIANGLES 1.  The co-interior angles are supplementary co-int A transversal line : A line that intersects two or more parallel lines.  Parallel lines : Lines that are always the same distance apart  Complementary angles : Two angles that add up to 90.  Supplementary angles : Two angles that add up to 180.  Vertically opposite angles : Angles opposite each other when two lines intersect.  Adjacent angles : Angles that share a vertex and a common side.  Revolution : Sum of the angles around a point, equal to 360  Reflex angle : Angle greater than 180 but less than 360

 Obtuse angle : Angle greater than 90 but less than 180  Acute angle : Greater than 0 but less than 90  ANGLE LANGUAGE: BĪ C AB and CD intersect (cross or cut) at E  Where two lines meet or cross, they form an angle.  A line is an infinite number of points between two end points. Twitter : : wtstutor WTS TUTORING Euclidean geometry  LINES AND ANGLES 2019 WTS EUCLIDEAN GEOMETRY GRADE : 11 AND 12 COMPILED BY : PROF KHANGELANI SIBIYAĮMAIL : P.