501 Geometry Questions

● Isosceles Triangle ORQ is also Right Triangle ORQ

● m∠ORQ = 90°

● m∠ROQ = m∠RQO < 90°

Another example of how a triangle can fall into two classification groups
is illustrated in the following triangle, ΔKJO. ∠J is an obtuse angle and
∠O = ∠K, which makes ΔKJO an isosceles triangle and an obtuse trian-
gle. It can be said that ΔKJO is an obtuse isosceles triangle.

● Obtuse Isosceles Triangle JKO

● m∠OJK > 90°

● m∠JKO and m∠KOJ < 90°

25 °

130 ° 25 °

K

J O

leg

leg

hypotenuse

45 °

45 °

R Q

O

501 Geometry Questions