90 ^ { \circ } \quad \text { (b) } 60 ^ { \circ } \quad \text { (c) } 45 ^ { \circ }
Evaluate
243000bc
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5400bc\times 45
Multiply 90 and 60 to get 5400.
243000bc
Multiply 5400 and 45 to get 243000.
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