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MATHS [1 Mark Question Answer]

Lines and Angles (Including Construction of angles) · ICSE STD 7 (ICSE - English Medium). 18 questions.

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[1 Mark Question Answer]

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18 questions · timed · auto-graded

Question 11 Mark
Are the following pairs of angles supplementary?
2x° + 65° and 115°− 2x°
Answer
2x° + 65° and 115°− 2x°
Yes, there are supplementary angles as their sum is 180° (2x° + 65° + 115°− 2x° = 65° + 115° = 180°)
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Question 21 Mark
Are the following pairs of angles supplementary?
26° 59′ and 153° 1′.
Answer
26° 59′ and 153° 1′
Yes, there are supplementary angles as their sum is 180° (26° 59′ + 153° 1′ = 180°)
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Question 31 Mark
Are the following pairs of angles supplementary?
139° and 39°.
Answer
139° and 39°
No, these are not supplementary angles as their sum is not 180° (139° + 39° = 178°)
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Question 41 Mark
Are the following pairs of angles complementary?
(x + 16)° and (74 − x)°
Answer
(x + 16)° and (74 − x)°
Yes, these are complementary angles as their sum is 90° (x° + 16° + 74°− x° = 90°)
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Question 51 Mark
Are the following pairs of angles complementary?
37° 28′ and 52° 33′
Answer
37° 28′ and 52° 33′
No, these are not complementary angles as their sum is not 90° (37° 28′ + 52° 33′ = 90° 1′)
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Question 61 Mark
Are the following pairs of angles complementary?
10° and 80°
Answer
10° and 80°
Yes, these are complementary angles as their sum = 10° + 80° = 90°
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Question 101 Mark
Write the complement of 21° 17'
Answer
Complement of 21° 17' = 90°− 21° 17'
= 68° 43' = 68° 43' .............(∵ P = 60')
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Question 111 Mark
How many lines can be drawn through three
(a) collinear points?
(b) non-collinear points?
Answer
(a) 1
(b) 3
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Question 131 Mark
out of $\overleftrightarrow{A B}, \overrightarrow{A B}, \overleftarrow{A B}$ and $\overline{A B}$ which one has a fixed length?
Answer
AB
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Question 151 Mark
Write the complement of (x + 5)°
Answer
Complement of (x + 5)° = 90°− (x + 5)°
= 90°− x − 5° = 85°− x
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[1 Mark Question Answer] - MATHS STD 7 Questions - Vidyadip