1. |
(a) |
a = 37° (s on same arc are equal) |
b = 61° (s on same arc are equal) |
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(b) |
c = 43° (alternate angles, parallel lines) |
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d = 43°(s on same arc are equal) |
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e = 43° (s on same arc are equal) |
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(c) |
f = 62° (at centre = 2 × at circumference) |
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g = 62° (s on same arc are equal) |
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(d) |
h = 110°(at centre = 2 × at circumference) |
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i = 250° (s at a point add to 360°) |
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j = 125° (at centre = 2 × at circumference) |
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(e) |
k = 96° (at centre = 2 × at circumference) |
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l = 42°(sum of isos. ) |
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m = 84°(adjacent s on st.line are supp.) |
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n = 90° (in semi-circle is 90°) |
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(f) |
p = 57° (s on same arc are equal) |
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q = 114° (at centre = 2 × at circumference) |
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r = 57° (base s of isos. ) |
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s = 57° (base s of isos. ) |
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(g) |
g = 28° (between tangent and radius is 90°) |
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h = 124° (sum of isos.) |
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i = 62° (sum of right-angled Æ is 180°) |
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j = 62° (base s of isos. ) |
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(h) |
t = 60° (s on same arc are equal) |
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u = 60° (base s of isos. ) |
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v = 30 °(between tangent and radius is 90°) |
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w = 30° (in semi-circle is 90°) |
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x = 30° (sum of is 180°) |