1. Choose the odd one out.
a)
b)
c)
d)
Answer: d)
Explanation: Figures in options (a), (b) and (c) are cylinders except in option (d).
2. What is the measure of each angle of an isosceles right triangle?
a) 90°; 30°; 30°
b) 90°; 45°; 45°
c) 90°; 60°; 30°
d) 90°; 60°; 45°
Answer: b) 90°; 45°; 45°
Explanation: Measure of each angle of an isosceles right triangle is 90°, 45° and 45°.
3. What is the reflex angle for the angle given below?
a)
b)
c)
d)
Answer: c)
Explanation:
The reflex of the angle 22° = 360° − 22°
= 338°
4. Identify the type of triangle based on angles.
a) Scalene triangle
b) Isosceles triangle
c) Equilateral triangle
d) Obtuse triangle
Answer: c) Equilateral triangle
Explanation: It is an equilateral triangle where all three sides are of the same length and all the three angles are equal. Measure of each angle is 60°.
5. What is the value of each equal angle of the given isosceles triangle?
a) 44°
b) 54°
c) 64°
d) 84°
Answer: c) 54°
Explanation: Sum of the three angles in the triangle = 180°
Measure of both the equal angles of the given isosceles triangle = 180° − 72° = 108°
Measure of each equal angle of the given isosceles triangle = 108° ÷ 2 = 54°
>> Join CREST Olympiads WhatsApp Channel for latest updates.
If your web browser doesn't have a PDF Plugin. Instead you can Click here to download the PDF
>> Join CREST Olympiads WhatsApp Channel for latest updates.
In this section, you will find interesting and well-explained topic-wise video summary of the topic, perfect for quick revision before your Olympiad exams.
>> Join CREST Olympiads WhatsApp Channel for latest updates.
This is Curio, your AI Doubt Solver. Here to help you with any educational doubts you encounter while preparing for your Olympiad exams. Feel free to ask questions and learn!