Answer: angle D = 71 degrees
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Explanation:
FGH is similar to EDC
Note the order of the letters. The order is important since it tells us how the letters pair up.
- F and E are the first letters, so F and E pair up. This means F = E.
- G and D are the second letters, meaning that G = D
- H and C are the third letters showing that H = C.
The diagram shows G = 71. Since G = D, we know that D = 71 as well. You can use the substitution property or the transitive property (both are effectively the same).
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Side note: The angles G and D are the top most angles in the diagram, so this is a visual way to see how they pair up. Keep in mind that the diagram won't always be helpful because it may not be drawn to scale or something may be rotated to trick you. It's best to use the letter pairing method in the previous section above.
