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Answer 1

Answer:

Given : PQ  =  7.5 cm and QS  =  6 cm

We know that,

All sides of rhombus is equal

So,

PQ  =  QR  =  RS  =  SP = 7.5 cm

To construct rhombus, we follow these steps—

Step 1 )  Draw a line QS  = 6 cm

Step 2 )  Now take radius of 7.5 cm and draw two arc on both side of line QS , by taking center Q

Step 3 )  Now take radius of 7.5 cm and draw two arc on both side of line QS , by taking center S . Both arc meet at P and R.

Step 4 )  Now join PQ , PS , SR and QR.

Answer 2

Answer:

Anatomical terminology. The pericardium, also called pericardial sac, is a double-walled sac containing the heart and the roots of the great vessels. It has two layers, an outer layer made of strong connective tissue (fibrous pericardium), and an inner layer made of serous membrane (serous pericardium).

Explanation: