NORTH LIBERTY HIGHER SECONDARY SCHOOL

CLASS VI (____) – MATHEMATICS – CLASSWORK SHEET 1

NAME:_____________________________________ DATE:______________

LESSON 11: BASIC GEOMETRICAL IDEAS

QI. Draw the line segments. (a) 5.3 cm

(b) 10.3 cm

(c) 9.2 cm

(d) 7.7 cm

QII. Using the given figure, classify the following angles as obtuse, acute or right angle.

Also, write their measures.

(a) ∠AOЕ _____________________________ (b) ∠СOD _____________________________

(c) ∠BOK _____________________________ (d) ∠СOI _____________________________

(e) ∠ЕOK _____________________________ (f) ∠EOM _____________________________

(g) ∠GОМ _____________________________ (h) ∠IOM _____________________________

QIII. Specify whether the angles are acute, obtuse, right, straight, or reflex angles.

(a) (b)

(i) ∠ABC _____________________________ (i) ∠ADE _____________________________

(ii) ∠BCD _____________________________ (ii) ∠BAD _____________________________

(iii) ∠CDE _____________________________ (iii) ∠AED _____________________________

(iv) ∠DEA _____________________________ (iv) ∠AEC _____________________________

(v) ∠BAE _____________________________ (v) ∠BED _____________________________

QIV. Classify the angles as obtuse, acute, right, straight, or reflex and fill up the table.

(a) 90° (b) 180° (c) 350° (d) 89° (e) 210° (f) 27°

Reflex angles _________________________________________________________________

Acute angles _________________________________________________________________

Right angles _________________________________________________________________

Obtuse angles _________________________________________________________________

Straight angles _________________________________________________________________

NLHSS – CLASS VI (__) – MATHS – PPT 1

NAME__________________________ DATE______

LESSON 11: BASIC GEOMETRICAL IDEAS

Duration: 15 minutes Marks: 20 marks

General Instructions: Use a pencil to answer the following questions.

QI. Draw the line segments. (½ × 4 = 2)

(a) 5.3 cm

(b) 7.7 cm

(c) 4.8 cm

(d) 3.1 cm

QII. Classify the angles as obtuse, acute, right, straight, or reflex. (½ × 4 = 2)

(a) 89° ______________________________________________

(b) 270° ______________________________________________

(c) 350° ______________________________________________

(d) 100° ______________________________________________

QIII. Specify whether the angles are acute, obtuse, right, straight, or

reflex angles. (½ × 4 = 2)

(i) ∠ABC ___________________________________________

(ii) ∠DAB ___________________________________________

(iii) ∠ADC ___________________________________________

(iv) ∠BCD ___________________________________________

QIV. Using the given figure, classify the following angles as obtuse,

acute or right angle. Also, write their measures. (½ × 8 = 4)

(a) ∠COM ______________________________ ____________

(b) ∠IOM ______________________________ ____________

(c) ∠GОМ ______________________________ ____________

(d) ∠JOA ______________________________ ____________