(a) What kind of numbers do you get if you add consecutive triangular numbers? Give examples.
(b) Complement of $∠ E$ is $∠ F$ , if $∠ E$ = $28^{\circ}$ , find $∠ F$ .
[2 MARKS]

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Solution

Each part: 1 Mark

(a) By adding consecutive triangular numbers, we get square numbers.
e.g. 1 + 3 = 4, 6 + 10 = 16, etc.

(b) $∠ F = 90^{\circ} - 28^{\circ}$ (Sum of complementary angles is 90 $^{\circ}$ )
$= 62^{\circ}$

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(a) What kind of numbers do you get if you add consecutive triangular numbers? Give examples. [2 MARKS]
(b) $∠ E$ is a complement of $∠ F$ and $∠ E$ = $28^{\circ}$ . Find $∠ F$

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(a) What kind of numbers do you get if you add consecutive triangular numbers? Give examples. (b) Complement of ∠E is ∠F, if ∠E= 28∘, find ∠F. [2 MARKS]

Each part: 1 Mark (a) By adding consecutive triangular numbers, we get square numbers. e.g. 1 + 3 = 4, 6 + 10 = 16, etc. (b) ∠F=90∘−28∘ (Sum of complementary angles is 90∘) =62∘

(a) What kind of numbers do you get if you add consecutive triangular numbers? Give examples.
(b) Complement of $∠ E$ is $∠ F$ , if $∠ E$ = $28^{\circ}$ , find $∠ F$ .
[2 MARKS]

Each part: 1 Mark

(a) By adding consecutive triangular numbers, we get square numbers.
e.g. 1 + 3 = 4, 6 + 10 = 16, etc.

(b) $∠ F = 90^{\circ} - 28^{\circ}$ (Sum of complementary angles is 90 $^{\circ}$ )
$= 62^{\circ}$