Calculating Angles in Triangles | Quizalize

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Calculating Angles in Triangles

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Q 1/20
Score 0
If angle A is 90 and angle B is 45 degrees, how do we calculate angle C?
30
90+45=135, 200-135=65 degrees
200-45-135=65 degrees
180-45=135 degrees
90+45=135, 180-135=45 degrees
Q 2/20
Score 0
What is angle C?
30
20 degrees
40 degrees
50 degrees
60 degrees

20 questions

Q.

If angle A is 90 and angle B is 45 degrees, how do we calculate angle C?

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1

30 sec

Q.

What is angle C?

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2

30 sec

Q.

If two of the angles in a triangle are 30 and 70 degrees, the third angle is 80 degrees.

3

30 sec

Q.

If angle A is 80 degrees and angle B is 50 degrees, what is angle C?

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4

30 sec

Q.

In a triangle, angle A is 60 degrees, angle B is also 60 degrees. How many degrees is angle C?

5

30 sec

Q.

If this triangle is isosceles and angle B is 80 degrees, what is angle C?

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6

30 sec

Q.

In a triangle, two of the angles are 90 degrees and 25 degrees. What is the third?

7

30 sec

Q.

If angle B is 85 degrees and angle C is 60 degrees, how many degrees is angle A?

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8

30 sec

Q.

Calculate angle C. What kind of triangle does it tell you this is?

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9

30 sec

Q.

How many degrees is the missing angle?

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10

30 sec

Q.

Angle C = _ degrees?

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11

30 sec

Q.

If angle A is 85 degrees and angle B is 41 degrees, what is angle C?

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12

30 sec

Q.

What is the size of each angle in an equilateral triangle?

13

30 sec

Q.

If angle B is 86 degrees and angle A is 30 degrees, how many degrees is angle C?

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14

30 sec

Q.

If this triangle is isosceles and angle A is 30 degrees, what are angles B and C?

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15

30 sec

Q.

In a triangle, two of the angles are 31 degrees and 70 degrees. How many degrees is the third?

16

30 sec

Q.

In an isosceles triangle, the top angle is 80 degrees. How big are each of the other two angles?

17

30 sec

Q.

How many degrees is angle C?

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18

30 sec

Q.

If two of the angles in a triangle are 30 and 60 degrees, the best description of the triangle is:

19

30 sec

Q.

If angle A is 87 degrees and angle B is 44 degrees, how many degrees is angle C?

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20

30 sec

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Calculating Angles in a Right Angle
7.2.1 Critical Angle 1. The critical angle is the angle of incidence at which the refracted ray: A. Bends toward the normal B. Bends away from the normal C. Travels along the boundary D. Is totally reflected Answer: C 7.2.2 Snell’s Law & Critical Angle 2. Which formula correctly represents the critical angle c when light travels from medium 1 to medium 2? A. n1cos⁡c=n2 B. n2sin⁡c=n1 C. n1sin⁡c=n2 D. n1sin⁡c=n2sin⁡90∘ Answer: D 7.2.3 Total Internal Reflection 3. Total internal reflection occurs only when: A. Light travels from air to glass B. Angle of incidence is less than the critical angle C. Light travels from a denser to a rarer medium D. Refractive index of the second medium is greater Answer: C 4. Which condition is not required for total internal reflection? A. Light must travel from a denser medium B. Angle of incidence must exceed the critical angle C. Refractive index of second medium must be lower D. Light must strike at 90° Answer: D 7.2.4 Ray Diagrams & Angle Calculations 5. A ray in water (n = 1.33) hits the surface at 40°. Critical angle = 48.8°. What happens? A. Refraction only B. Total internal reflection C. No refraction D. Light stops Answer: A 7.2.5 Snell’s Law in Glass Blocks & Prisms 6. A ray enters glass (n = 1.5) from air at 30°. Which statement is correct? A. It bends away from the normal B. It bends toward the normal C. It travels straight D. It undergoes total internal reflection Answer: B 7. In a prism, the deviation of light occurs mainly because: A. Light slows down in glass B. Light speeds up in glass C. Light reflects internally D. Light cannot pass through glass Answer: A 7.2.6 Mirages 8. A mirage appears on a hot road because: A. Light reflects off the sky B. Light refracts through layers of air with different densities C. Light undergoes dispersion D. Light travels in straight lines only Answer: B 7.2.7 Dispersion Through a Prism 9. Dispersion occurs because: A. All colors refract equally B. Different wavelengths refract differently C. The prism reflects light D. White light cannot be refracted Answer: B 7.2.8 Rainbow Formation 10. A rainbow is formed due to: A. Refraction only B. Total internal reflection only C. Dispersion only D. Refraction + TIR + dispersion Answer: D 7.2.9 Optical Fibers 11. Optical fibers work mainly due to: A. Refraction B. Diffraction C. Total internal reflection D. Dispersion Answer: C 12. Which is an advantage of optical fibers? A. High signal loss B. Immune to electromagnetic interference C. Very heavy D. Slow data transmission Answer: B
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