1. The measure of each angle of an equilateral triangle is
x° + x° + x° = 180° ⇒ x° = 30°
x° + x° + x° = 180° ⇒ x° =45°
x° + x° + x° = 180° ⇒ x° =90°
x° + x° + x° = 180° ⇒ x° =60°
2. How many altitudes can a triangle have?
1
2
3
4
3. Which of the following statements is true?
A triangle can have two right angles
A triangle can have two obtuse angles
A triangle can have two acute angles
A triangle can have all the three angles less than 60°
Answers
Answer:
Take three noncollinear points A, B and C on a page of your notebook. Join AB, BC and CA. What figure do you get?
Name: (i) the side opposite to ∠C
(ii) the angle opposite to the side BC
(iii) the vertex opposite to the side CA
(iv) the side opposite to the vertex B
Figure
ANSWER:
We get a triangle by joining the three non-collinear points A, B, and C.
(i) The side opposite to ∠C is AB.
(ii) The angle opposite to the side BC is ∠A.
(iii) The vertex opposite to the side CA is B.
(iv) The side opposite to the vertex B is AC.
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Answer:
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