Things that can erupt are: volcanoes, emotions, anger.
- A volcano erupted in the Mauna Kea last night.
- Ranjan’s anger erupted as a result of Ashima’s continuous nagging.
Things that can surge are: prices, wave, crowd, storm, etc
(i) The kind of person the doctor is (money, possessions)
(ii) The kind of person he wants to be (appearance, ambition)
ABCD is a quadrilateral in which AD = BC and ∠ DAB = ∠ CBA (see Fig. 7.17). Prove that
(i) ∆ ABD ≅ ∆ BAC
(ii) BD = AC
(iii) ∠ ABD = ∠ BAC.
