Som hoeken is 180 graden
3p
Gegeven is \(\triangle K\kern{-.8pt}L\kern{-.8pt}M\) met \(\angle M = 64\degree\) en \(\angle K = 71\degree \text{.}\)
Bereken \(\angle \text{L} \text{.}\)
Rond indien nodig af op één decimaal.
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De som van de hoeken in \(\triangle K\kern{-.8pt}L\kern{-.8pt}M\) geeft \(\angle M + \angle K + \angle L = 180\degree \text{.}\)
1p
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Dus \(\angle L = 180\degree - \angle M - \angle K \text{.}\)
1p
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\(\angle L = 180\degree - 64\degree - 71\degree = 45\degree \text{.}\)
1p
3p
Gegeven is \(\triangle P\kern{-.8pt}Q\kern{-.8pt}R\) met \(\angle Q = 36\degree\) en \(\angle R = 35\degree \text{.}\)
Bereken \(\angle \text{P} \text{.}\)
Rond indien nodig af op één decimaal.
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De som van de hoeken in \(\triangle P\kern{-.8pt}Q\kern{-.8pt}R\) geeft \(\angle Q + \angle R + \angle P = 180\degree \text{.}\)
1p
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Dus \(\angle P = 180\degree - \angle Q - \angle R \text{.}\)
1p
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\(\angle P = 180\degree - 36\degree - 35\degree = 109\degree \text{.}\)
1p