Q4 - 3RD SUMMATIVE TEST

Quiz by Maria Resureccion M. Borja

Grade 9
Mathematics
Philippines Curriculum: Grades K-10 (MELC)

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10 questions
Show answers
• Q1

Which of the following summarizes the law of sines?

$bcSinA\ =\ acSinB\ =\ abSinC$

$a\ Sin\ A\ =\ b\ Sin\ B\ =\ c\ Sin\ C$

$\sin\ A\ =\ Sin\ \ B\ =\ Sin\ C$

$\frac\left\{a\right\}\left\{Sin\ A\right\}=\frac\left\{b\right\}\left\{Sin\ B\right\}=\frac\left\{c\right\}\left\{Sin\ C\right\}$

60s
• Q2

The acute angle that has the same sine value as 130° is:

$20\degree$

$30\degree$

$50\degree$

$40\degree$

60s
• Q3

To be able to use the sine rule in a triangle, we must always know:

two angles

one angle and one side

one angle and the length of its opposite side

two sides

60s
• Q4

What are the two angles that have the same sine value?

50⁰ and 150⁰

40⁰ and 130⁰

40⁰ and 140⁰

20⁰ and 120⁰

120s
• Q5

With respect to the given angle, what is the ratio of the opposite side to the hypotenuse?

Sine

cosecant

tangent

cosine

60s
• Q6

Evaluate Sine 90⁰

0

1

.5

2

60s
• Q7

In the triangle DEF, what is the measure of angle E to the nearest degree

$17\degree$

$20\degree$

$18\degree$

$19\degree$

300s
• Q8

Using the law of cosine, which formula is to be used?

a²=a²+c² -2bc (cos A)

a=b²+c² -2bc² (cos C)

a=b²+c² -2bc(cos A)

a²=b²+c²-2bc (cos A)

60s
• Q9

In aright triangle, with respect to the given angle, what is the ratio of the adjacent side to the hypotenuse?

secant

tangent

cosine

sine

60s
• Q10

What are the two kinds of oblique triangle?

obtuse only

right and acute

acute and obtuse

acute only

60s

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