1. III. DOING:
Make a simple simple sketch and fill in the given informations.
22-30. A person is standing on the ground at a point 80ft from the base of a building.
The angle of elevation to the top of the building is 58o
. To the nearest foot, how high
is the building?
--END—
CHRISTIAN HORIZON SCHOOL, INC.
#0004 Purok Mabinati-on Ubaldo D. Laya,
Iligan City Tel # 223-0200/228-0316
Junior High School Department
4th Summative Examination
March 31&April 1, 2023
MATHEMATICS
Grade 9
Name:_______________________________________________________
KNOWLEDGE
12
UNDERSTANDING
9
DOING
9
TOTAL
30
PLEASE TAKE NOTE!!!
"Correct answer but not following simple instruction, I will still mark it
wrong”
Teacher: Noli C. Caliso, LPT
2. I. KNOWLEDGE:
A. Read carefully and encircle the letter of your choice.
1. Trigonometric functions sometimes also called _________.
A. Trigonometric ratios B. Trigonometric functions
C. Circular Functions D. Circular ratios
2. A/An _____ is formed by two rays with a common endpoint. The two rays are called the
sides of the angle and the common endpoint is called its vertex.
A. vertex
B. Angle
C. line
D. ray
3. The units of measurement used for angles are_______.
A. Degrees B. Radian C. both A&B D. None of the above
4. A degree is equal to what part of the circumference of a circle?
A. 1/360 B. 360 C. π D. 1 rad
5. To convert degree measurement into radians, we multiply the number of degrees
by___.
A. π/180° B. 180° /π C. 180° D. π
6. Which of the trigonometric functions is a reciprocal of cosecant?
A. sine B. cosine C. tangent D. secant
7. Which of the trigonometric functions is also called inverse tangent function?
A. cotangent B. arctan C. arcsine D. arccosine
8. How many degrees that a 3 revolutions has?
A. 360o
B. 720o
C. 1080o
. D. 180o
9. An angle formed above between the horizontal line and the line of sight.
A. angle of elevation B. angle of depression C. right angle D. acute
10. Suppose we have sinX = ¾, what should we do to get the angle measure of X?
A. get the inverse of tangent B. get the inverse of cosine
C. get the inverse of sine D. NONE OF THE ABOVE
11. The hypotenuse of the trigonometric ratio represents what part of a circle?
A. Diameter. B. Radius C. central angle D. x-axis
12. Which of the following is not true?
A. Pythagorean Theorem is only applicable with a right triangle
B. SOH CAH TOA can also be used for oblique triangles
C. Law of sine and cosine can be used for Oblique triangles
D. ALL OF THE ABOVE
II. UNDERSTANDING
B. Read carefully and write the letter of your choice on the space provided
before each number.
____13. Convert 110o
into radians.
A. 10/18 π rad B.18/10 π rad C.5/9 π rad D.9/5 π rad
____14. Convert 5/6 π radians into degrees.
A. 90o
B.150o
C.900o
D. 300o
____15. How many revolutions could 1260o
could have?
A.3 ½ B.3 C. 3 ¼ D.3 1/8
For questions 16-21, refer to the figure below. A boy which 7 ft tall kicked a ball to a 13 ft
distance. (round off your answer to a whole number)
____16. Find the Sin A.
A. 7/13 B. 13/7 C. 15/13 D. 13/15
____17. Find the Sec A.
A. 7/13 B. 13/7 C. 15/13 D. 13/15
____18. Find the Cos B.
A. 7/13 B. 13/7 C. 15/13 D. 13/15
____19. Find the degree measure of the angle A.
A. 62o
B.61o
C.61.7o
D.62.5o
____20.Suppose Angle A is 70o
and CB is 16 ft , find the height of the boy.
A. 5 ft B.6 ft C. 5.8 ft D. 5.82 ft
____21. Suppose Angle A is 70o
and CB is 16 ft , find the length of the line of sight of the
boy.
A. 13 ft B.17 ft C. 20 ft D. 14 ft
