You decide you want to frame the photograph from above, but only have a frame made to hold a photograph that is 12cm by 21cm. You decide you will need to cut a paper mat to go around the photograph (like a border). What is the surface area of that border? Hint: Make a small drawing and let that guide you through the solution.
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Step-by-step explanation:
BSMT MT1K ka po ba ng ceu
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Answer:
Step-by-step explanation:
Given: 12 cm & 21 cm
Formula: A = a outside – a inside
A = 21 cm x 12 cm – 15 cm x 6 cm
A = 252 cm – 90 cm
A = 162 cm2
The surface area of the border is 162 cm2
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