Answer:
From the Silurain to Devonian period
Explanation:
Diversification of fish began during the Silurian period continued during the Devonian Period. The lobe-finned fishes first appeared during the Silurian.
Answer:
SSS
Explanation:
From the diagram given, it is indicated that the 3 sides of one triangle are congruent to the 3 corresponding sides of the other triangle. This satisfies the SSS Congruence Criteria for proving that two triangles are congruent.
The congruency theorem that can be used to state that the two given triangles are congruent is SSS.
Answer:
Explanation:
Three seismographs
Three seismographs are needed. A circle is drawn from each of the three different seismograph locations, where the radius of each circle is equal to the distance from that station to the epicenter. The spot where those three circles intersect is the epicenter (Figure 13.12).
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