Which word best replaces dog in the sentence? i give brainlist

The measure of the angles supplement is 30 more than four times that of its complement. find the measure of the angle described

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Which statements about the two fossil images are correct? 1. cave bears are ancestors of plateosaurus. 2. plateosaurus were present on earth before ostracoderms. 3. ostracoderms were the first to die. 4. plateosaurus died after the ostracoderms. 5. cave bears are the oldest fossils.