1.？ 1AP is perpendicular to BC, P is perpendicular to feet, and DH is perpendicular to BC and H. Because the angle C=45 degrees, it is easy to know that CH=4 and PH=AD=5, PB=x=3.

2DP is perpendicular to BC, and P is perpendicular to feet. From 1, we can know that PC=4, so PB=x=8.

2.？ 1AP is parallel to BE, PE=AD=5, BP=x= 1 because BE=6? ,

2DP is parallel to AE, PE=AD=5, BP=x= 1 1 because BE=6.

3.